Enterprise

Season Three

The Xindi

It is about six weeks after the Enterprise entered the Delphic Expanse. A council of strange alien creatures representing the different Xindi races discusses its plans to attack and annihilate Earth and the fact that the Enterprise is in the Expanse. Some members want to immediately set upon and destroy the Enterprise. Meanwhile, on the basis of information obtained from a transport captain, the Enterprise goes to a trillium mining planet so that Captain Archer can question a Xindi who is a forced laborer in the mine. But the mine supervisor has tricked Archer and Tucker, and has set a trap to capture the Enterprise and its crew as mine laborers. But, sensing trouble when three heavily armed ships approach the planet, T'Pol sends the ship's new MACO (Military Assault COmmando) team to rescue Archer and Tucker. The Xindi that they were looking for, however, is injured in the fire fight. Later, back aboard the Enterprise, the Xindi manages to give Dr. Phlox the coordinates for the Xindi homeworld before he dies of his wounds. But on arriving at the coordinates, the Enterprise finds only the debris field of a planet destroyed about 100 years earlier. Archer surmises that the weapon to be used to attack Earth is being built elsewhere in the Expanse, and the Enterprise continues its search.

Anomaly

Strange happenings aboard Enterprise stops the ship near a disabled alien vessel. An away team in EVA suits finds the crew dead from a combination of lack of oxygen and weapons fire. Another alien ship soon arrives in the area and beams a boarding party onto Enterprise. They beam away most of Enterprise's supplies and weapons and then warp away. However, one of the attackers is captured. Questioned by Archer, the prisoner tells him that their ship was trapped in the Expanse and they were forced into a life of piracy in order to survive. Still at sub-light speed only, Enterprise tracks the raiders to an areas where a cloaking device has hidden a 1,000-year old man-made moon. An away team in a shuttlepod enters the interior of the moon and finds a cache of stolen supplies, including most of the ones taken from Enterprise. Also found is evidence that the pirates had attacked a Xindi ship, but Enterprise's prisoner doesn't "remember" the incident until Archer puts him in a decompressing airlock. The prisoner finally agrees to talk, and Archer learns that the pirates had downloaded the Xindi ship's database. When the pirate ship returns to its lair, Enterprise attacks and Archer pushes to the limits to allow Hoshi to download the Xindi database from the pirates' computer. Archer then releases his prisoner to his pirate comrades. Later, in his quarters, Archer begins to review the Xindi database.

Extinction

Archer reconstructs star charts from the Xindi database and sets course for a promising planet. An away team shuttles down to the location of what appears to be a landing craft and find a Xindi shuttle and two bodies. But soon Archer, Reed, and Hoshi begin to suffer a transformation into a primitive non-human species. T'Pol appears to be unaffected, and uses Hoshi's universal translator to communicate with the other three. Even in their primitive state of mind, they are set on finding something. Tucker, learning of the away team's problems, goes down with another team in EVA suits and they manage to subdue Reed and bring him back to Enterprise. Two alien ships soon arrive and the commander warns Enterprise away from what is considered to be a quarantined planet because of a dangerous virus that transforms its victims into members of a long-extinct species. With this information, Dr. Phlox begins to work on developing a cure. But the alien commander wants to immediately send an "extermination" team down to the planet to eradicate the Enterprise crew who have been contaminated. Tucker, therefore, finds himself in a race against the aliens to locate Archer, Hoshi, and T'Pol and return them to Enterprise. He succeeds, and Enterprise warps away, with the two alien ships in hot pursuit. Dr. Phlox eventually finds a cure for the virus and Archer, Reed, and Hoshi begin the slow recovery process.

Rajiin

The Xindi council discusses a failure of the latest test of their weapon to destroy Earth, and agree to give their scientists more time. Meanwhile, Archer, Tucker, and Reed go down to a watery planet with a floating trading post, where they try to obtain the formula for synthesizing Trellium-D, which can be used to block spatial anomalies in the Delphic Expanse from affecting the ship and crew. They learn that a slave trader had some Xindis as customers recently and pay a visit to the slave trader's establishment. While there, a beautiful slave girl catches Archer's eye, and when the away team leaves, she makes a break for freedom and is helped to escape to Enterprise by Archer and company. Later, aboard the ship, the slave girl, named Rajiin, begins to exhibit strange powers, affecting members of the crew when she touches them. When T'Pol resists her, she physically assaults T'Pol, seriously injuring her. Rajiin is eventually captured and placed in a detention cell. She eventually confesses to Archer that she was planted by the Xindi to obtain information about the humans. Soon two Xindi ships intercept Enterprise and send boarding parties, who stage a deadly prison break. Enterprise tries to recapture Rajiin, but they're unsuccessful. Later, Rajiin is brought before the Xindi council and reveals that by touching members of the crew, she was able to scan their anatomy. With this information, the Xindi plan to further develop their biological weapon against Earth.

Impulse

T'Pol is in a hysterical state as Archer carries her to sickbay and Dr. Phlox straps into into an examining table. Flashback to a day earlier. . . . Enterprise picks up a distress call from the Vulcan ship Seleya, which entered the Delphic Expanse 9 months earlier. The Seleya (on which T'Pol had served before coming aboard the Enterprise) is trapped inside an unstable asteroid field. Archer leads an away team into the field in a shuttlepod, and they dock with the Seleya. Once inside, they find the ship to be a mess -- torn up and battered almost beyond recognition. Surviving crew members are like walking zombies, with nothing but homocidal intent on their minds. The away team has to fire upon them, but with stun setting only, the Vulcans are soon pursuing them again. T'Pol soon begins to experience feelings of anxiety and fears that she might become like the other Vulcans. Meanwhile back on Enterprise, Tucker and Mayweather take another shuttlepod to land on a nearby asteroid to mine Trellium to use as shielding for Enterprise. On the Seleya, the away team has been cut off from their escape route to the shuttlepod and need help from Enterprise as soon as possible. By this time, T'Pol is becoming paranoid, accusing Archer of not trusting Vulcans. On Enterprise, Dr. Phlox discovers that Trellium acts as a toxin to Vulcans. That is what has affected the Seleya's crew, but they have been exposed to it so long that there is no hope of helping them -- they are all dying. The imperative now becomes for the away team to return to Enterprise as soon as possible so that T'Pol can be treated. The away team continues to fight off the hordes of attacking Vulcans and eventually make it back to the shuttlepod only by overloading the Seleya's central systems to open up locked hatches. With last-minute help from Tucker in the second shuttlepod, Archer's shuttle is broken free from the Seleya and they make it back safely to Enterprise. . . . Sometime later, T'Pol is finally beginning to response to Dr. Phlox's treatment and begins a slow recovery.

Exile

T'Pol's studies of the Xindi database suggests the existence of a second man-made sphere, which may be the source of the spatial anomalies in the Delphic Expanse. As Enterprise heads in the direction of the sphere, Hoshi begins to hear voices and see someone strange aboard Enterprise. Her hallucinations become more intense, and eventually she's contacted by an alien telepath who is on a planet 3 light years away and offers to help Hoshi gain information about the Xindi. Archer agrees to detour to the planet, and an away team shuttles down. The alien asks to see and inspect an artifact associated with the Xindi so that he can focus his telepathic abilities in that direction. Hoshi says on the planet with the alien at his request. Enterprise, meanwhile, continues on towards the second sphere and an away team led by Archer heads down to the sphere's surface to take scans. Back on the planet, the alien tells Hoshi that he was exiled on this isolated planet because of his telepathic abilities. Hoshi soon comes to realize that the alien wants her to remain with him as his companion. Because of his long lifespan, four former companions have died on him and his is now alone. By now, Enterprise is heading back to pick up Enterprise, and the alien reluctantly agrees to let Hoshi leave. But when Captain Archer comes to pick her up, he tells Hoshi that the alien refuses to give him the information he has gained about the Xindi unless she agrees to remain with him. Archer asks Hoshi to stay, telling her that they'll come back to pick her up later. But Hoshi becomes suspicious, and soon realizes that the alien has projected Archer's image into her mind to trick her into staying with him. The ruse exposed, Hoshi goes back to Enterprise, but without the information about the Xindi. Later, as Enterprise nears the limits of the alien's telepathic powers, he contacts Hoshi and gives her an important piece of information -- the coordinates of a Xindi colony where part of their doomsday weapon is being constructed. He tells Hoshi that he doesn't want her to come to harm, therefore, his decision to give her the information.

The Shipment

Enterprise arrives at the coordinates given to Hoshi by the telepathic alien. Archer, Reed, and MACO Major Hayes shuttle down to the planet and discover a Xindi facility that is emitting many types of radiation. The facility refines a susbstance, called chemosite, that is important to the Xindi weapon. Archer wants to follow a shipment of the substance in the hope it will lead them to the Xindi weapon. The away team holds one of the Xindi technicians, who seems to be a sympathetic character and talks to Archer about the history of the Xindi people. It appears that the then-six Xindi races were at war and the more agressive reptilians and insectoids used weapons that destroyed their homeworld and completely wiped out a now-extince avian race. The technician, of a bear-like Xindi race, offers to help Archer get information on the weapon the Xindi council is building. The technician did not know about the Xindi threat to Earth and the fact that the chemosite (which has many uses) was being made a part of a weapon. When the reptilian Xindi arrive to pick up their last shipment of weapons-grade chemosite, Archer is able to sneak into their shuttle to plant a tracking device, while the xindi technician contaminates the chemosite shipment, making it unusable. But later, when the Xindi shuttle leaves orbit, it enters an energy portal and disappears from Enterprise's sensors. The Xindi technician, however, tells Archer that the energy portals have a short range, therefore Enterprise should not give up trying to find the shuttle and the location of the weapons factory. At least the technician's help in contaminating the chemosite will set back completion of the weapon by several months.

Twilight

Captain Archer awakens to the sound of weapons fire and rushes to the bridge just in time to see the Earth being blown to bits by a Xindi probe.... He later again awakens, this time to find himself 12 years in the future on an outpost planet with and older T'Pol fixing a meal from him. She explains to him that 12 years earlier, Enterprise had run into another anomaly in the Delphic Expanse and, in saving her, he was hit by the anomaly and infected with parasite that have destroyed his ability to remember anything more than a few hours old. After that accident, Starfleet had put her in command of Enterprise and they continued in their mission to stop the Xindi -- but were unsuccessful. The 6,000 surviving humans are on this planet outpost on Ceti Alpha V. During the years, Dr. Phlox had experimented with ways to cure Archer of the parasites, which happen to exist partially in a sub-space warp. Shortly after, Dr. Phlox comes to the outpost with news that he thinks he has found a cure for Archer, but they'll need to perform the procedure aboard Enterprise, which is in orbit standing guard from any more Xindi attacks. But unknownst to Phlox, he had been followed by a mercenary, who reported back to the Xindi on the location of the last remaining humans. They mount a fierce attack on Enterprise as Phlox's procedure on Archer begins to show signs of success. Phlox and T'Pol also discover that in curing Archer in the present, the parasites also are disappearing in scans of Archer's brain that were performed in the future. They surmise that if they can eradicate all of the parasites, the past 12 years may also be reversed, giving Enterprise another chance to stop the Xindi. In a desperate last ditch effort, Phlox, T'Pol, and Archer himself work to curse Archer even as Enterprise begins to disintergrate around them. In the end, their efforts are successful, and Enterprise finds itself back in its original timeline, still searching for the Xindi's doomsday weapon.

North Star

In what appears to be a typical Old Western town, a man is lynched by a group of men. The next morning, Captain Archer, T'Pol, and Tucker scout the place in period disguises. Reed, from orbit, determines that the oldest structures on the planet are about 200 years old. It soon becomes evident that a group of people -- called "Scags" -- are considered to be of a lesser class and are scorned upon by the others. Archer makes friends with a school teacher, who takes him to a settlement of Scags and tells him that the Scags are of an alien race known as the Scagarians. About 300 years before, Scagarians visited an Old Western town on Earth and kidnapped some of the residents and brought them here as laborers. Eventually, the humans revolted and became the dominant species, continuing life in their Old West lifestyle. The Scagarians are now the laborers and are even prohibited from being taught in schools. The teacher has been secretly teaching the Scagarian children. Later, the teacher is discovered and put in the local jail. Archer tries to break her out, but they're caught by a mean-spirited deputy sheriff and his men (the ones who had lynched the Scag man in the opening scene). Facing death, Archer calls to Enterprise for an emergency beam out. With the away team's identity as strangers to this planet know known, Archer decides to try to come to an understanding with the more open-minded sheriff of the town and eventually succeeds. But the deputy's gang confronts Archer and the others in a gun fight that leaves the sheriff wounded. With a show of force, the Enterprise group eventually manages to bring the situation under control, and the sheriff agrees to see to it that the town's laws are changed to be more fair to the Scagarians, even allowing the teacher to begin to formally school them in Earth history during the hundreds of years since the humans were originally kidnapped (courtesy of datagiven to her by Archer). Archer promises to do everything he can to see that the humans are returned to Earth after Enterprise finishes its mission in the Delphic Expanse.

Similitude

Captain Archer presides over the burial in space of Commander Tucker. Flashback to 2 weeks earlier . . . While experimenting with a way to enhance Enterprise's war drive, the ship runs into a strange energy field that causes an explosion. Tucker is critically injured, with damage to neural tissues and Dr. Phlox does not expect him to survive. The only way to save Tucker is to use one of Dr. Phlox's alien creatures to create a 15-day lifecycle clone of Tucker, from which healthy neural tissue can be harvested. Despite the ethical implications, Archer agrees to the procedure because of the importance of Tucker to Enterprise's mission in the Delphic Expanse. Soon, Dr. Phlox is caring for a baby boy, who progresses quickly to boyhood, teenager, young man, and finally to Tucker's current age. The clone, named "Sim" by Phlox, has all of Tucker's memories at each stage in development. When he asks about his parents, Archer is forced to tell him the truth about who and what he is. Meanwhile, Enterprise is dead in space with a decaying substance forming on the hull. Unless the ship can be repaired and exit this energy field soon, they will never be able to escape it. Now fully grown, Sim tells T'Pol about the feelings he has developed for her -- but isn't sure if they are his or Tucker's. Later, Archer implements a plan developed by Sim to use two shuttlepods to try to tow Enterprise out of the energy field. With some difficulty, the plan succeeds. But Phlox has bad news for Archer, when he harvests the neural tissues from Sim, Sim will not survive. When confronted with this reality, Sim at first rebels, saying that he deserves to live as much as Tucker does. But eventually Sim agrees to the procedure, which Phlox performs successfully. . . . Back to where we started, Archer completes his burial trip to "Sim" Tucker and his casket is ejected into space.

Carpenter Street

On Earth, sometime in 2004, a man receives a mysterious phone call from a reptilian Xindi. Later, he picks up a hooker on a street corner, sedates her and takes her to an abandoned building, where two other unconscious humans are laid out on cots with intravenous tubes running to their bodies... Aboard the Enterprise in the 22nd Century, Daniels appears to Captain Archer and tells him that his 30th Century comrades have detected three Xindi in Detroir of 2004. Archer and T'Pol are transported back in time, where they promptly steal a truck, rob an ATM machine for some cash, and set off in search of the Xindi They locate the building where the Xindi are hiding with the help of a tricorder. Before they can investigate, however, the man returns with another victim for the Xindi. Archer and T'Pol follow him to his apartment, where he explains that his mysterious (and unknown) employers are paying him $5,000 for each human. He said they said they were not going to harm the humans, but needed a sample of each blood type. He has already delivered six, and two more are needed. Pretending to be police officers, Archer and T'Pol promise not to arrest the man if he cooperates with them. Archer pretends to be another victim in order to infiltrate the Xindi hideout, and soon finds out that the Xindi are extracting blood samples from the victims in order to fabricate a bio-toxin, presumably to be taken back to the 22nd Century for use in their weapon against Earth. When Archer confronts them, they flee the building with the toxin, but with T'Pol's help, they are kill before they can release the toxin into the atmosphere. Archer and T'Pol transport forward in time to the Enterprise with the three Xindi bodies and all of their paraphanelia, leaving the man back in 2004 Detroit to answer to the real police for kidnapping the six victims.

Chosen Realm

Enterprise answers the distress call of a small alien ship, and brings the inhabitants aboard. The aliens (Triannons) are a religious cult who venerate the alien pheres that cause the anomalies in the Expanse. But they turn out to be religous zealots who resort to arming themselves with an organic explosive, which they aren't hesitant to use, in order to take over control of Enterprise. Having hijacked Enterprise and confined most of its crew to their quarters, the Triannons plan to return to their home planet and use Enterprise's weaponry to destroy "enemies of the truth" who have different beliefs from the members of this cult. They consider Enterprise's reconnaisance of the spheres as a desecration punishable by the death of an Enterprise crew member to be chosen by Archer. The leader of the Triannons also erases Enterprise's files related to the spheres. Archer offer himself up for execution to appease the Triannons, but it really all a ruse and his "execution chamber" is really Enterprise's transporter pad. Archer is "executed" by having him transported to a hidden part of the ship, from where he masterminds a plan to retake control of Enterprise. The Triannons are eventually returned to their homeworld by Enterprise to find that it has already been devasted and millions of its inhabitants killed by the Triannons' "holy war."

Proving Ground

Andorian Commander Shran leads his ship into the Expanse in search of Enterprise. Meanwhile, the Xindi counsel prepares for a test of their doomsday weapon. Elsewhere, Enterprise runs into an expanding anomaly field and Shran's ship finds them and tractors them to safety. Welcomed aboard Enterprise, Shran offers to help Archer find and stop the Xindi. But it's obvious that Shran still has a lot of animosity towards Vulcans, and this rubs off on his attitude towards T'Pol. Some of Shran's officers are allowed aboard Enterprise to help repair damaged systems. One of these is a female Andorian who is assigned to help Reed with the weapons systems. After the repairs are completed, Enterprise and the Andorians, using the more sophisticated Andorian long range sensors, find the Xindi proving grounds and witness a failed test of the weapon, which still manages to almost tear a test moon into pieces. They later manage to steal the weapon, with the Andorian ship tractoring it into its cargo hold. However, Shran's true motives in helping the humans is soon revealed, as he has been under orders to steal the Xindi weapon and bring it back to his homeworld, to be used as a threat against the Vulcans. However, Archer gets the upper hand (having intercepted the Xindi activation codes) and activates the weapon while it's still inside the Andorian ship. Shran has no choice but to eject it just before it overloads and explodes. The Andorian ship in damaged and limps back home, while Enterprise, with sensor scans of the weapon, continues on its mission to stop the Xindi once and for all.

Stratagem

Captain Archer and Degra (the Xindi engineer who is developing the weapon against Earth) are in a small vessel trying to evade attack by insectoid Xindi ships. Archer explains to the disoriented and confused Degra that they've just escaped from 3 years in an insectoid prison camp, where they have been force interrogated. Archer tells Degra that Enterprise was unsucessful in stopping the destruction of Earth. Then the insectoids turned their attacks on the other Xindi species. Archer then recounts to Degra how the two of them turned from being mortal enemies to cooperators during their time together in the prison camp. Degra then tells Archer about his role in the Xindo plot against Earth. Later, it becomes apparent that Archer and Degra are actually inside a flight simulator aboard Enterprise as part of a scheme to trick Degra into revealing the location of the planet where the Xindi weapon is being cnostructed. But Degra becomes suspicious, and Archer's scam is revealed and Degra is returned to Enterprise's brig, where the other crew members of Degra's captured ship are being held. But Archer continues in "con" mode, and still manages to trick Degra into revealing the secret planet's location. Degra and his crew are sedated and released, while Enterprise heads for the planet, which is called Azati Prime.

Harbinger

Tucker is giving a female MACO officer a Vulcan neuro-pressure massage. She then thanks him with a passionate kiss. Enterprise is enroute to the presumed location of Azati Prime. Archer informs Reed that MACO Major Hayes wants to give special training to Enterprise's security personnel, but this causes friction between Reed and Hayes. Later, Enterprise encounters another spatial anomaly, from which they rescue a single alien in a small pod. He's brought to sickbay, where Dr. Phlox finds that his cellular structure is disintegrating. T'Pol also finds that a group of the mysterious spheres are generating the anomaly. Meanwhile, the tensions between Reed and Hayes escalate during a training excercise on hand-to-hand combat, and the two eventually come to blows with each other. Also, T'Pol begins to show signs of jealousy over the friendship that's developing between Tucker and the MACO officer. Later, during a neuro-pressure session, T'Pol and Tucker's feelings come to the surface and are consumated. In sickbay, the mysterious alien recovers his strength and begins to literally travel right through the ship's bulkheads, causing all kinds of disruptions to ship systems before the crew can capture him. Later, T'Pol and Tucker agree to put what happened behind them. While Archer is dressing down Reed and Hayes for their physical confrontation with each other, he's called to sickbay, where the alien is dying. In his dying breath, he tells Archer that when the Xindi destroy Earth, his species will prevail.

Doctor's Orders

Dr. Phlox chases porthos to Captain Archer's quarters, where the Captain is lying in bed, apparently unconscious. Later, Phlox begins to dictate a letter to a medical colleague back on Earth. He explains that in order to safely traverse another anomaly without causing neural damage to the crew, Plox put the crew in a comatose state. Only he, T'Pol, and Porthos are still conscious and running the ship. Still later, Phlox hears strange noises aboard the ship, one of many such incidences he begins to experience -- apparently the result of an over-active imagination. T'Pol, however, relishes the solitude aboard the ship with the human crew in deep sleep. As Phlox's apparent hallucinations continue -- to the extent of him seeing two Xindi insectoids aboard the ship -- T'Pol begins to believe that Plox is being affected by the anomaly. Phlox, for his part, arms himself and begins a deck-by-deck search of the ship, looking for the two Xindi. After a particularly harrowing hallucination involving Hoshi, Phlox finally realizes that he too is being affected by the anomaly. T'Pol admits that she also is being affected in that she's finding it harder to control her emotions. But they soon find that the anomaly is expanding at a rapid rate, and it will now take the ship months instead of days to get out it at impulse speed. The only alternative is to fire up the warp drive, something that Tucker had warned could be dangerous inside the anomaly. Phlox and T'Pol have a hard time figuring out the on-screen instructions for starting the warp drive, but eventually manage to do so, and Enterprise soon emerges from the anomaly. As Phlox begins to make his rounds to awaken the crew, he's startled to find, upon entering T'Pol's quarters, that she too was unconscious the whole time. The T'Pol that helped him overcome his hallucinations while in the anomaly was also a hallucination -- a figment of his imagination.

Hatchery

While enroute to Azati Prime, Enterprise comes upon a planet with what appears to be a Xindi shipwreck. An away team is sent down and discovers the corpses of Xindi insectoids and an incubator containing more than 30 unhatched eggs. While inspecting the egg-sacks, Captain Archer is sprayed by one, causing a flesh burn on his face, which Dr. Phlox treats. Later, against the recommendations of T'Pol and Tucker, Archer decides to do what he can to save the eggs. He sees this as an opportunity to show the Xindi that humans do not represent a threat to their species. When two of the embryos are accidentally killed, Archer decides that they should have a proper burial. He also decides to use some of Enterprise's antimatter stores to bring up the power in the Xindi incubator. Eventually, Enterprise's senior officers begin to question Archers decisions and actions, because they are endangering Enterprise's more important mission. Archer reacts by placing T'Pol under confinement, guarded by a MACO officer. Tucker later goes to T'Pol's quarters under pretense of needing a neuro-pressure treatment. He and T'Pol discuss the possibility that Archer is acting under some kind of outside control, and begin to plan a mutiny to regain control of the ship. The urgency of the situation is heightened, when Archer also relieves Reed of duty and places MACO Major Hayes in command of the bridge. Tucker brings Phlox to Archer to secretly scan him, but the scans are not conclusive. T'Pol and the others decide it's time to act when Archer decides to send a distress call to the Xindi on behalf of the unhatched eggs. The mutiny succeeds, and T'Pol and the other regain control of the bridge from the MACOs. Tucker then goes down to the planet and stuns Archer with a phase pistol. Later in sickbay, Phlox confirms that the liquid that the egg had previously sprayed on Archer had placed him in a frame of mind of being the caretaker of the eggs. This explained his previous actions. Archer is then treated and Enterprise resumes its course toward Azati Prime.

Azati Prime

Enterprise arrives in the vicinity of the Azati Prime system just as Degra's convoy is also arriving. The system is encircled by a satellite sensor grid that Enterprise can't penetrate without being detected. Tucker and Mayweather are sent, in a previously captured Xindi shuttle, to penetrate the grid and perform recon of the area. They find a Xindi base deep under the surface of the planet's ocean. Later, back on Enterprise, the away team briefs Archer. The weapon is almost complete and the only way to destroy it appears to be with a suicide mission to drive two photonic torpedoes into the heart of the weapon. Archer insists, over the objections of his officers, that he will carry out the suicide mission. As he prepares to leave, Archer is suddenly transported, by time-traveler Daniels, into the 26th Century... Aboard the Enterprise-J, Daniels tells Archer that the mysterious sphere-builder species are the ones who have convinced the Xindi that humans want annihilate them. However, this is just a trick of the sphere-builders to get rid of the humans and launch their own campaign to take over this realm of space. From aboard the Enterprise-J, Archer witnesses the Battle of Procyon 5, the one in which humans and Xindi together defeat the sphere-builders. Daniels warns Archer that he needs to try to convince the Xindi that humans are not a threat to them -- not attack the Xindi. But Archer is unwilling to follow Daniel's advice... Now back in his own time and on his own Enterprise, Archer sets out on his suicide mission. But he's soon captured by the reptilian Xindi, who chain him up and interrogate him, trying to get information on the strength of human forces in the Expanse. But Archer refuses to speak to anyone but Degra. He gives Degra a medallion from the 26th Century (which Daniels had given him as proof of his time travels) and tries to convince Degra of the truth of the story that Daniels had told Archer. Meanwhile, Enterprise has been found by the reptilian Xindi, who mount a devastating attack against it, leaving the ship an almost lifeless hulk with many of its crew dead.

Damage

Heavily damaged and with massive casualties, Enterprise drifts in space waiting for the next wave of Xindi attacks, but it never comes. The Xindi Council, angry that the reptilians launched their attacks unilaterally, have recalled all Xindi ships. The Council also has Captain Archer released and returned to Enterprise. Later, Hoshi finds that a message in the systems of the Xindi capsule used to transport Archer back to Enterprise contains a hidden message from Degra, asking that Archer meet him at a designated coordinate in 3 days. But Enterprise's warp drive is down, and there's no way for the ship to make the rendezvous. Coincidentally, a small alien ship arrives in the area of space where Enterprise is, requesting assistance. Archer tries to negotiate with the aliens for a warp coil to power Enterprise's warp drive, but the aliens refuse because this would leave them without warp drive themselves. Archer, however, is now desperate in his drive to stop the Xindi from attacking Earth. He must meet with Degra to try to work out a ceasefire. Despite the ethical implications, Archer decides to mount a raiding party to steal the warp coil from the small alien ship, in return giving them food supplies and trellium to protect themselves from the anomalies that are common in the Expanse. Meanwhile, the Xindi Council meets with a female representative of the Sphere-Builder species, who tries to convince them to proceed with their attack on Earth. The Council members, however, are now suspicious of the Sphere-Builders' motives and are non-committal. Back on Enterprise, T'Pol begins to show ever increasing loss of control of her emotions. She eventually sneaks into the decompressed cargo bay in an EVA suit to recover some trellium samples, from which she extracts a substance which she injects into herself. Later, in full knowledge of the consequences of her condition, T'Pol confides to Dr. Phlox that she started using the substance several months earlier because it helped her to experience her emotions and to better interact with the human crew. But she has now become addicted to the substance. Phlox agrees to help her overcome her addiction. Archer's plan is eventually executed, and Enterprise sends a boarding party to the small alien ship and makes off with its warp coil, leaving the aliens with only impulse power. Once the warp coil is installed on Enterprise, they warp away to rendezvous with Degra.

The Forgotten

A memorial service is held aboard Enterprise for the 18 crew members who were killed in the Xindi attacks, during which Archer vows to succeed in saving Earth from destruction. One of the dead crew members was a young woman who was a part of Tucker's engineering team, and Archer asks him to write home to her parents. Phlox examines T'Pol and finds only traces of trellium in her system. But she tells him that she's having a hard time controlling her emotions. He tells her that because of the long-term effects of the trellium, she may have to learn to live with her new-found emotions. Enterprise eventually arrives at the rendezvous point and follows Degra's ship to another hidden location. Degrea tells Archer that the Xindi Council wants Archer to provide proof that he's telling the truth about the scheme being played out by the Sphere Builders. He brings Degra and another Xindi member aboard Enterprise and shows them evidence of the reptilians' attempts in Earth's past to unleash a biogenic weapon and Dr. Phlox's test results on the body of the Sphere Building that Enterprise had rescued some weeks earlier from an anomaly. Degra appears to believe what Archer is telling them, but the other Xindi still wants more proof. Meanwhile, Tucker is having a hard time composing the letter to his crewmate's parents. He eventually comes to realize that his feelings regarding her death are tied up in his feelings for his own sister's death. Later, a plasma leak erupts near one of the warp nacelles, threatening to destroy the ship. Tucker and Reed have to make a dangerous spacewalk to make repairs. Soon after, a reptilian warship arrives on the scene and begins to attack Enterprise. Degra joins forces with Archer to destroy the reptilians. Degra later tells Archer that he should speak directly with the Xindi Council to try to convince them of the truth about the Sphere Builders. Degra tells Archer about a sub-space corridor Enterprise can use to reach the location of the Xindi Council within the 3-day window before the Xindi weapon is to be deployed against Earth, and Archer makes ready to enter the corridor.

E²

A Vulcan man tells an aged T'Pol that the Xindi probe (which attacked Florida) has been launched against Earth. She responds that they now have no choice but to contact Captain Archer. . . In the present, Tucker comes to T'Pol's quarters for neural pressure therapy, but she's reluctant. He confesses to her that he really came to her quarters because he's concerned about how she's isolating herself from the rest of the crew. Meanwhile, Enterprise has arrived at the vicinity of the trans-warp corridor they have to traverse to reach the rendezvous with Degra. But the corridor is guarded by ships from the species that inhabits that area of space. Suddenly, Enterprise is intercepted by a duplicate of itself from another timeline. The duplicate (Enterprise-2) is crewed by the descendants of the original crew, and the Vulcan man seen earlier is the captain. He tells Archer that when Enterprise entered the trans-warp corridor, something went wrong and the ship was thrown back 100 years in time. The ship became a generational ship, with successive generations waiting for the right time to try to stop the initial Xindi attack and also warn Archer not to enter the trans-warp corridor. The Vulcan captain, who is the son of Tucker and T'Pol, tells Archer that they have had a chance to upgrade Enterprise-2's technology over the past 100 years and they can upgrade the original Enterprise to warp 6, which would allow it to arrive at the rendezvous with Degra without having to traverse the corridor. Work soon begins on upgrading the warp drive on Enterprise. The older T'Pol, however, later warns the young T'Pol that her calculations show that the original Enterprise can not withstand the strain of warp 6 travel, but she has found out why the first attempt to traverse the trans-warp corridor didn't work. Archer is willing to attempt the trans-warp flight with T'Pol's calculations, but the Vulcan captain of Enterprise-2 is unwilling to risk that maneuver. He attempts to sabotage Enterprise and go himself to rendezvous with Degra, and this results in the two Enterprises firing upon each other in a stand-off. Eventually, Archer convinces the Vulcan they have to work together if they are to have any chance of saving Earth. The two ships approach the corridor and are immediately attacked by the territorial inhabitant's of the area. The original Enterprise manages to break away and enter the corridor while Enterprise-2 continues to fight off the attackers. Enterprise soon emerges at the other end of the corridor, early for the rendezvous with Degra, who will take them to meet with the Xindi Council. But there is no sign of Enterprise-2 -- did it cease to exists upon the original Enterprise's successful trans-warp trip or was it destroyed by the attackers? Enterprise's crew will never know the fate of their descendants.

The Council

Captain Archer meets with Degra and tells him that Archer is sending an away team to try to penetrate and study a nearby sphere. Later, a Sphere-Builder appears aboard Degra's ship and tries to convince him not to join forces with the humans, but Degra isn't swayed. Degra later tells Archer that the Sphere-Builders are revered by the Xindi almost as gods, and it will be difficult to convince the Xindi Council of Archer's claim that they're just using the Xindi. When Enterprise, in company of a number of Xindi ships arrive at the planet where the Xindi Council is located, the reptilians tries to challenge them, but is forced to withdraw by the other Xindi. Meanwhile, the shuttlepod arrives at the sphere and penetrates it. The away team, consisting of T'Pol, Tucker, Mayweather, and a MACO soldier, begin to explore it. Remote defense systems are activated and kill the MACO. The away team is able to get some information, but not as much as they had hoped before having to flee to safety. Back at the Xindi Council planet, Archer and Hoshi, as translator, arrive at the Council chamber. Archer addresses the Council, but the belligerent reptilians and insectoids refuse to listen to what he has to say and walk out. Later, the Sphere-Builder appears to the reptilian leader and convinces him to steal the doomsday weapon and launch it against Earth without waiting for approval from the Council. The Sphere-Builder promises to make the reptilians the strongest race among the Xindi. Back at the Council chamber, Archer makes a presentation using the body of the Sphere-Building that Enterprise had earlier tried to help. Later, Degra informs Archer that the reptilians have finally begun to come around and have agreed to hold off on launching the weapon against Earth. But this is just a ruse on the part of the reptilian leader. He goes to Degra's quarters and kills him so that he can gain access to the weapon. The reptilians and insectoids launch the weapon into space and make off with it, guarding it with a fleet of their ships. The other Xindi races join Enterprise in trying to stop the renegade reptilians and insectoids, but they kidnap Hoshi by transporting her off of Enterprise's bridge and disappear into a trans-warp corridor.

Countdown

Hoshi is aboard the repitilian ship, where they plan to force her to help them decipher the activation codes for the doomsday weapon. They inject parasites into her brain to make her more cooperative. Meanwhile on Enterprise, the away team returns from the sphere with a memory core, which they immediately begin to analyze for clues as to how the network of spheres in the Delphic Expanse can be deactivated. Archer concludes that the only way to stop the reptilians and insectoids from activating the weapon is for Enterprise to convince the Xindi humanoids, arboreals, and aquatics to join forces and attack the weapon directly. The aquatics are at first hesitant to act, but agree when Archer tells them that Enterprise can deactivate the spheres (a bit of an exageration on Archer's part at this point). Inside the weapon, the reptilians check on Hoshi's progress in deciphering the codes, but find that she is more resistant than anticipated against the parasites and has, in fact, added a new layer of encryption. Eventually, though, the reptilians gain the necessary codes on their own and begin the activation process. They're soon intercepted by Enterprise and the allied Xindi fleet and a fierce firefight erupts. Archer sends a MACO team to retrieve Hoshi. The rescue attempt is successful, but Major Hayes is seriously wounded and later dies aboard Enterprise. Seeing that things are going badly for the reptilians and insectoids, the sphere-builders interfere by activating a sphere in the vicinity of the weapon, destroying several of the allied Xindi ships and giving the reptilians and insectoids the opportunity to get away towards Earth through a trans-warp vortex. Later, the insectoids begin to have second thoughts about what they plan to do, and the reptilians destroy their ship. Back on Enterprise, Archer launches a two-pronged attack on the enemy. He sends Tucker and T'Pol, in Enterprise, to try to overload a key sphere in the network in the hopes of deactivating the entire net, while he and Reed lead a MACO team, in Degra's ship, to board and destroy the doomsday weapon from the inside.

Zero Hour

Captain Archer, Reed, Hoshi, and a MACO team are aboard Degra's ship in hot pursuit of the doomsday weapon. Meanwhile, Enterprise is enroute to the nearby sphere to try to disable it with the hope that this will disable the entire network of spheres. But the sphere-builders are beginning to form an anomaly around the sphere in the hopes of stopping Enterprise. Back on Degra's ship, Hoshi is deep in guilt about not having been able to prevent the reptilians from accessing the weapon's activation codes, but Archer needs her to snap out of it to help him decrypt Degra's schematics of the weapon. Archer is ready to go on a suicide mission into the weapon to destroy it... Suddenly, he finds himself seven years in the future, with Daniels telling him that he should let someone else go on the mission because Archer mustn't die. Daniels tells him that he is destined to play a major role in the creation of a United Federation of Planets. But Archer is insistent that his priority is to the "here and now" and demands that Daniels return him to Degra's ship... Enterprise drops out of warp near the growing anomaly. With some innoculations administered by Dr. Phlox, the crew will have only 15 minutes to disable the sphere without the effects of the anomaly becoming fatal. Meanwhile, near Earth, the doomsday weapon and its accompanying reptilian ship exit the trans-warp vortex, with Degra's ship still in pursuit. The reptilians immediately destroy a nearby human space station. Back on Enterprise, its crew is starting to feel the effects of the anomaly, but continue firing a beam of high energy at the sphere in the hope of overloading it. The sphere-builders now interfere personally, by boarding Enterprise to disrupt the energy beam. The Enterprise crew stop them and, with time running out, succeed in destroying the sphere. Almost immediately, the network of sphere's begins to deactivate and the many anomalies in the Delphic Expanse begin to slowly disappear. Back near Earth, Shran the Andorian comes to Enterprise's aid. He goes on the offensive and attacks the reptilian ship. With this distraction, Degra's ship can approach the weapon, and Archer's team transports in. With Hoshi's help, they begin deactivating the weapon, going through a detailed sequence of commands that Hoshi has been able to decrypt from Degra's schematics. After fighting off a group of reptilians aboard the weapon, they succeed in deactivating it, but Archer wants to also destroy it. As he begins to set explosive charges, Archer orders the rest of the away team to beam back to Degra's ship. Soon, the reptilian leader beams in and Archer has to fight him off in fierce hand-to-hand combat. Meanwhile, Shran succeeds in destroying the reptilian ship. Inside the weapon, with the reptilian leader now also dead, Archer sets the last explosive charge and begins running to the beam out site, but not soon enough. The weapon explodes just short of having reached Earth orbit. Sometime later, Enterprise waits for Degra's ship to meet up, but when it does, the bad news is that Captain Archer isn't aboard. The crew is, of course, stunned by the news. Later, with Enterprise's crew still reeling from Archer's apparent death, the Xindi aquatics take Enterprise into the huge cargo bay of their ship and take Enterprise back to Earth. Once in orbit, Enterprise tries to contact Earth, but without any success. Tucker takes a shuttlepod to take a close look at San Francisco to see what could be wrong, but the shuttle is soon fired upon by a group of American P-51 Mustang fighter airplanes of World War II vintage. The scene shifts to a Nazi camp, where a prisoner turns out to be an injured but very much alive Captain Archer. One of the Nazis is revealed to be, not human, but an unfamiliar alien man.