Timeline - April 2151 to February 2152

TREKCORE > TIMELINE > Enterprise Season 1 (April 2151 - February 2152)

The following are events of the first season of Enterprise:

April 13, 2151 Archer receives a call from Trip outlining the schedule for tomorrow's inspection of Enterprise and planning to meet over breakfast.

In February 2151, Archer is brought back in time to this date by Daniels, who uses this relocation in time as an opportunity to explain the reason for the destruction of the colony.
April 13, 2151 to April 20, 2151 Events of "Broken Bow."

In the nine decades following Zefram Cochrane's visionary warp flight in space and the First Contact that followed, the human race has been slowly guided by the Vulcans toward developing the Warp Five engine. Mankind is at last able to explore the virgin depths of space with a revolutionary new starship, the Enterprise NX-01, under the command of Captain Jonathan Archer. Plans to launch Enterprise are moved up when a Klingon courier, Klaang, is shot down by unknown assailants and crash-lands in Broken Bow, Oklahoma. Feeling that the Vulcans have been condescending toward mankind for years, Archer insists it's the humans' responsibility to return the injured Klingon to his homeworld alive.

The Enterprise speeds along her way, but suddenly the ship experiences a power failure and unknown chameleon-like aliens invade and kidnap Klaang from Sickbay. Dr. Phlox examines a captured alien and discovers he's a Suliban who has been genetically altered. Archer orders Mayweather to set a course for the Rigel system, Klaang's last stop before crashing on Earth. At Rigel X, the Enterprise away team discovers an amazing multitude of alien life at a trading complex there. Archer eventually meets Sarin, who tells him of a Temporal Cold War in which the Suliban are being used to incite internal strife within the Klingon Empire. Klaang was bringing proof of this back to his High Council in order to avoid the Empire being thrown into chaos. Hidden Suliban soldiers suddenly attack, forcing Archer, Sarin and the rest of the away team to fight their way back to Enterprise. During the extremely intense firefight Sarin is killed.

The crew track the Suliban vessel to a gas giant planet, and discover a huge Suliban mothership, or "Helix," with 3000 lifesigns on board. They are attacked by several individual Suliban cell ships, but manage to capture one with the ship's grappler. Archer and Tucker learn to fly the stolen craft and use it to infiltrate the Helix while Enterprise hides in a dense upper layer of the atmosphere. Archer and Tucker find Klaang and release him while fending off the Suliban with their new phase-pistols. While Tucker takes the Klingon back to Enterprise, Archer stays behind to set off a magnetic disruptor that dismantles the Helix. Trying to stay alive while waiting for pick-up, Archer discovers a Temporal Chamber used by the Suliban to obtain their orders from a mysterious shrouded figure from the future. Archer is found by the Suliban leader, Silik, and the two struggle against each other in a time-shifted environment. Realizing he's no match for the genetically mutated Suliban, Archer tries to gain some distance by exiting the chamber, where time returns to normal. As Archer runs, Silik fires his weapon dead center into Archer, but at that moment the captain dematerializes, being unwittingly beamed back to Enterprise by a nervous Tucker using the relatively untried bio-transporter.

Leaving the Suliban behind, Enterprise warps away and successfully delivers Klaang to his homeworld. The Klingon Chancellor draws blood from Klaang, and his scientists find hidden within his DNA Suliban data proving their conspiracy to undermine the Empire.

Back aboard Enterprise, Archer receives orders from Starfleet that henceforth, he and his crew are to officially begin their mission of exploration. Gratefully acknowledging her assistance in the mission's success, Archer sets aside his pride and convinces T'Pol to remain on the ship as Science Officer. A course is laid in for the nearest inhabited planet, and the crew of Enterprise boldly warps toward the unknown.

End of episode was two weeks prior to the start of "Fight or Flight", events of the episode covered roughly one week. Archer gives a date of April 16,2151 in the episode.

Note: Although the Temporal Cold War ceases, and the timeline is restored in "Storm Front - Part II," certain events of that Cold War appear to have remained. The events of "Broken Bow" involving the Suliban presumably remain, although this does present a significant paradox.
April 21, 2151 - May 3, 2151

 		 The Enterprise traverses an ion storm. (After "Broken Bow.")

The Enterprise explores several planets and star systems, but encounters no intelligent life forms. Hoshi brings a slug aboard from one such planet.  (Between "Broken Bow" and "Fight or Flight")
May 4 - May 6, 2151 Events depicted in the episode "Fight or Flight."

As they continue their deep space exploration, the Enterprise crew comes across an alien ship where they discover 15 humanoid corpses that seem to have been part of a scientific experiment. The horrific sight inspires Hoshi to panic and demand a return to Earth, but Archer insists on continuing the mission and finding out more about the abandoned dead. Trouble comes calling when the aliens that were conducting the gruesome experiments return and begin attacking Captain Archer and his team.

Date of May 6, 2151 is given in mission log. First contact with Axanar vessel had occurred two days previous. "Fight or Flight" (ENT)

At this time Hoshi seriously considered leaving Starfleet, but ultimately decided not to. ("Exile")
May 11- May 12, 2151 Events of "Strange New World."

Trip, Mayweather and T'Pol go on a survey mission to a seemingly uninhabited Earth-like planet where a mysterious alien presence sends them into a state of paranoid overdrive. When a violent storm strands them on the planet, Archer must find a way to save his crewmembers before they turn dangerously upon one another.  (Three weeks after the beginning of the voyages of Enterprise.)
c. May 20, 2151 Events of "Unexpected."

When Trip is dispatched to assist an alien ship with its power source problems, he is delighted to have a friendly encounter with one of the ship's female engineers. But after discovering that their special moment has resulted in his becoming pregnant, he realizes he's had an unwitting experience with alien sex. Archer and his crew must then try and return the rapidly growing alien baby to its mother.  (One month after the visit to Qu'onos)
Early June 2151 (date is speculation) Events of "Terra Nova"

The Enterprise crew alters course to investigate the mystery of Terra Nova, a legendary Earth colony whose inhabitants mysteriously disappeared decades ago. But when they arrive, they confront descendents of the colonists who have become more alien than Archer could ever have imagined.
c. June 21, 2151 Events of "Andorian Incident "

The Enterprise crew pays a friendly visit to an ancient Vulcan spiritual sanctuary, despite T'Pol's concerns that her human colleagues will be an awkward and disruptive presence there. Upon landing, they discover that the monastery has been forcibly taken over by the Andorians, a paranoid and highly excitable race of aliens with a long history of conflict with the Vulcans. Archer soon discovers that the Enterprise crew has gotten in the middle of an interstellar Pandora's Box and now must find a way out.  (It is noted in the episode that it has been 9 weeks and 4 days since the Enterprise left Earth.)
Early July 2151 (date is speculation) Events of "Breaking the Ice"

Trip learns that T'Pol is transmitting secret messages to a Vulcan ship, which has been shadowing Enterprise for weeks. Meanwhile, Archer must attempt a dangerous rescue to recover two crewman stranded on a rapidly disintegrating comet.
c. July 31, 2151 (date is speculation) Events of "Civilization"

Captain Archer and the crew discover a fully inhabited, civilized though less advanced Earth-like planet. Disguised to look like its inhabitants, they pay the planet an exploratory visit where they learn that a pernicious illness is afflicting the local population. As Archer seeks to help them find the malady's source, he finds himself in a close encounter with a comely female alien.
August 2151 Events of "Fortunate Son"

Enterprise must intervene when the leader of a human freighter crew sets out for revenge against alien pirates.
c. September 4, 2151 Events of "Cold Front"

According to T'Pol, this episode takes place four months, three weeks and six days in the ship's mission.

While Enterprise joins an alien pilgrimage to witness a religious stellar occurrence, Archer finds himself again faced against the Suliban warrior Silik.

Note: Although the Temporal Cold War ceases, and the timeline is restored in "Storm Front - Part II," certain events of that Cold War appear to have remained. The events of "Cold Front" involving the Suliban presumably remain, although this does present a significant paradox.
c. September 21, 2151 Events of "Silent Enemy"
Attacked by an unidentified enemy ship, the crew struggles to get their new phase canons operational. Meanwhile, Archer realizes that no one knows Reed well enough to give him a personalized birthday gift. Date of September 21, 2151 given in episode.
c. September 30, 2151 (date is speculatioN) Events of "Dear Doctor"

The crew discovers a new planet with two races, one in desperate need of medical and scientific assistance. In the course of trying to help, Dr. Phlox recalls his own Denobulan past to address the ethical dilemmas that arise in the present.
Early October 2151

 		 Events of "Sleeping Dogs"

When Enterprise comes across a wounded Klingon vessel, T'Pol, Hoshi and Reed take a shuttlepod down to investigate. There they are ambushed by a hostile female Klingon who hijacks the shuttlepod, leaving the Enterprise crewmembers dangerously stranded aboard the Klingon vessel.
Mid October 2151 The Andorians give the Vulcans on P'Jem warning to evacuate, and then proceed to invade and occupy the planet. (just prior to "Shadows of P'Jem" (ENT)
Late October 2151
 		 Events of "Shadows of P'Jem"
Archer and the crew are disappointed to discover that T'Pol has been ordered by the Vulcan High Command to leave the Enterprise — and equally frustrated at her seeming indifference to leaving their ranks. T'Pol's last mission as a Starfleet officer, however, proves eventful when she and Archer are kidnapped by a militant faction on an alien planet and find themselves once again at the mercy of the volatile Andorians.
c. November 9, 2151
 		 Events of "Shuttlepod One"

On a routine shuttlepod mission to investigate an asteroid field, Trip and Reed find themselves suddenly cut off from the Enterprise and become convinced that the mothership has been destroyed. With a limited oxygen supply and almost no chance of being rescued, the opposite-minded twosome must battle their annoyance with one another while also coming to terms with their impending demise. (Date of November 9, 2151 given in episode)
Late November 2151 Events of "Fusion"

Captain Archer agrees to assist a civilian Vulcan ship with repairs, and learns this group of Vulcans left their homeworld years ago to explore ways to reintegrate emotions into their lives. As the two crews work together and become fast friends, one of the visitors named Tolaris reaches out to T'Pol and urges her to experiment with releasing her own "primal nature."  (Seven months since Enterprise left Earth)
Early December 2151 Krem, the Ferengi, first starts serving aboard his cousin's merchant vessel. (one month before "Aquisition")
c. December 2151 Events of "Rogue Planet"

While exploring an uncharted planet, Enterprise crew members encounter a group of aliens who are hunting down indigenous creatures for recreation. During their exploration, Archer is mesmerized by visions of a woman desperately attempting to communicate with him. The woman's ethereal distress signal informs Archer that she and others like her are actually the prey of the alien hunters. Heeding her call, Archer levels the playing field against the alien hunters.
c. January 2152 Events of "Acquisition"

When the Ferengi, a group of intergalactic thieves, stun the Enterprise crew and try to rob the ship, it's up to Trip to work covertly to stop them. After the Ferengi awaken the Captain to force his assistance in pillaging his ship, Trip secretly reveals to Archer that he has inadvertently escaped the effects of the noxious gas and they work together to try to surreptitiously thwart the robbery and save the crew.
 
c. January 2152 Events of "Oasis"

While exploring a crashed vessel on a desolate planet, the Enterprise crew is haunted by some ghostly figures, and they encounter an alien race that has survived despite insurmountable odds. Trip helps repair their derelict vessel and is befriended by Liana, an attractive humanoid alien who develops feelings for him.
January 2152 Events of "Detained"

While exploring a planet, Archer and Mayweather enter a "military zone" and are detained in an internment prison by an alien race called Tandarans, who are at war with the Suliban. While the Enterprise crew's previous encounters with the Suliban have been disastrous, Archer and Mayweather find themselves sharing a cell with some Suliban detainees who they believe may be wrongly imprisoned.
Late January 2152 Events of "Vox Sola"

A strange, symbiotic alien creature boards the Enterprise capturing a few of the crew members, including Archer and Trip, and cocoons them in its web feeding off their bodies to survive. With the captured crewmembers' lives in jeopardy, Hoshi, under T'Pol's command, faces her biggest challenge by trying to find a way to communicate with the lifeform in order to return it to its home planet.
February 6 - February 9, 2152
 		 Events of "Fallen Hero"

When a Vulcan ambassador is accused of secretive criminal misconduct, Enterprise is asked to transport her back to the Vulcans. Following an attack by a corrupt alien race, T'Pol defends the Ambassador and, for the first time, asks Archer for his help. Meanwhile, after the Vulcan diplomat boards the Enterprise, alien weapons begin firing from hostile ships, putting everyone's lives at risk. (Date of February 9, 2152 given in episode)
February 9, 2152 Captain Archer makes a log entry regarding Ambassador Velar, which is later played by the aliens who try to take over the Enterprise in "The Catwalk."
February 12 - February 15, 2152 Events of "Desert Crossing"

When Archer and Trip are invited to a desert-like planet by an alien leader after they help fix his ship, they discover he is a terrorist who has lured them onto his planet under false pretenses. Meanwhile, T'Pol, while in command, faces a tough decision when she cannot locate Archer and Trip in the desert. (Date of February 12, 2152 given in episode)
February 18 - February 22, 2152 Events of "Two Days and Two Nights"

When the crew takes shore leave on the famous pleasure planet of Risa, Archer has a mysterious encounter with an alien woman; Hoshi has a surprising romantic rendezvous; Mayweather has a rock-climbing accident; and Trip and Reed go clubbing only to end the evening as unwitting victims of robbery. Meanwhile, Phlox stays on board the Enterprise with T'Pol to take his annual 48-hour hibernation and exhibits some uncharacteristic oddities when they have to wake him up after an injured crew member returns from shore leave. (Date of February 18, 2152 given in episode)
Roughly February 25 - March 1, 2152 Events of "Shockwave"

After apparently causing the obliteration of an alien colony, Enterprise is ordered to return to Earth, until a surprise visitor offers Archer startling evidence about what really happened. ("10 months" after "Broken Bow")

Note: Although many of the events of "Shockwave" are resolved through subsequent changes to the timeline, and furthermore the Temporal Cold War itself ceases, and the timeline is restored in "Storm Front - Part II," certain events of that Cold War appear to have remained. The events of "Shockwave" involving Daniels and the Suliban presumably remain, although this does present a significant paradox.