Storm Front, Pt. 1
Season 4, Episode 1 TV-PG
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With Silik's help, Archer searches for the temporal operative who altered Earth's past and threatens to destroy all of time.
Storm Front, Pt. 2
Season 4, Episode 2 TV-PG
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With Silik's help, Archer searches for the temporal operative who altered Earth's past and threatens to destroy all of time.
Home
Season 4, Episode 3 TV-PG
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Enterprise returns to Earth to a hero's welcome, Archer is haunted by his experiences and actions in the Expanse.
Borderland
Season 4, Episode 4 TV-PG
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Criminal Arik Soong is brought aboard Enterprise to assist in finding some genetically enhanced humans he created after stealing altered DNA left over from the Eugenics Wars.
Cold Station 12
Season 4, Episode 5 TV-PG
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Soong returns to Cold Station 12 with the Augments, a medical facility where he once worked, where there are hundreds of genetically engineered human embryos stored.
The Augments
Season 4, Episode 6 TV-PG
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After turning on their creator, the Augments attempt to start a war between Humans and Klingons.
The Forge
Season 4, Episode 7 TV-PG
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Earth's embassy on Vulcan is bombed and the evidence points to a religious faction known as "Syrrannites," a group following a revolutionary interpretation of the teachings of Surak, the father of Vulcan logic.
Awakening
Season 4, Episode 8 TV-PG
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Archer and T'Pol locate the Syrrannites. However, unbeknownst to Archer and T'Pol, more is going on than just a simple act of terrorism.
Kir'Shara
Season 4, Episode 9 TV-PG
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Archer, T'Pol and T'Pau attempt to take a sacred, but controversial artifact back to the Vulcan High Council, in hopes of settling an internal struggle going on among the Vulcan people.
Daedalus
Season 4, Episode 10 TV-PG
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The inventor of the transporter, Emory Erickson, comes aboard Enterprise for a risky experiment.
Observer Effect
Season 4, Episode 11 TV-PG
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Non-corporeal aliens study the Enterprise crew as they respond to a fatal viral infection brought on board from an away mission.
Babel One
Season 4, Episode 12 TV-PG
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Enterprise journeys to Babel with a Tellarite ambassador on board for peace talks with the Andorians, when a distress call from Shran is received.
United
Season 4, Episode 13 TV-PG
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Archer tries to unify the Andorians, Tellarites and Vulcans in a plan to capture a marauder ship threatening to destabilize the region.
The Aenar
Season 4, Episode 14 TV-PG
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Archer visits Shran's icy homeworld to find an Andorian subspecies called the Aenar, to determine their connection to the marauder destroying ships in the region.
Affliction
Season 4, Episode 15 TV-PG
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While Enterprise visits Earth for the launch of Columbia, Phlox is kidnapped and forced to help the Klingons deal with a grave threat to their species.
Divergence
Season 4, Episode 16 TV-PG
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With Columbia's help, Enterprise's crew grapples with sabotage to their ship as they pursue the truth behind the kidnapping of Phlox.
Bound
Season 4, Episode 17 TV-PG
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As a gift for negotiating with the Orion Syndicate, Captain Archer receives three Orion Slave Girls. Soon, their seductive powers begin to affect everyone on board except for Trip and T'Pol.
In a Mirror, Darkly, Pt. 1
Season 4, Episode 18 TV-PG
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In the mirror universe, Commander Archer mutinies against Captain Forrest in order to capture a future Earth ship found in Tholian space.
In a Mirror, Darkly, Pt. 2
Season 4, Episode 19 TV-PG
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In the mirror universe, Archer commandeers the 23rd-century Defiant from the Tholians and uses it in a nefarious power grab.
Demons
Season 4, Episode 20 TV-PG
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A xenophobic faction of humanity threatens to undermine talks to form a new coalition of planets.
Terra Prime
Season 4, Episode 21 TV-PG
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A human isolationist leader threatens to destroy Starfleet Command unless all aliens leave Earth immediately.
These Are the Voyages
Season 4, Episode 22 TV-PG
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Commander William Riker of the Enterprise-D is torn between his loyalty to Captain Picard and his duty to a former captain.