Star Trek: Enterprise

Season 4

TV-PG

60%83%

Upon returning home after preventing a second Xindi attack, Enterprise explores cultural shifts on Vulcan; forges alliances with Earth's neighbors in the face of Romulan aggression; deals with a plague inside the Klingon Empire; explores the Mirror Universe; and overcomes xenophobic elements to lead an interstellar community.

Where to Watch Season 4

22 Episodes

Storm Front (1)
E1
Storm Front (1)Following the destruction of the Xindi weapon, the Enterprise crew discovers that they have been sent back in time to 1944. However, history has been altered, leaving Nazi Germany in control of a large portion of the eastern United States.
Storm Front (2)
E2
Storm Front (2)With Silik's help, Archer hones in on the temporal operative who altered Earth's past and threatens to destroy all of time.
Home
E3
HomeOnce the NX-01 finally returns to Earth, the weary crewmen face repercussions of their journeys, both positive and negative.
Borderland (1)
E4
Borderland (1)When genetic supermen left over from the Eugenics Wars hijack a Klingon ship, Archer must rely on their creator, the criminal Dr. Arik Soong, to help hunt them down.
Cold Station 12 (2)
E5
Cold Station 12 (2)Arik Soong leads his band of Augments to a medical facility where hundreds of genetically enhanced embryos are still stored, intending to retrieve them and bring them to life.
The Augments (3)
E6
The Augments (3)In defiance of their "father," Arik Soong's Augments devise a heinous plot against the Klingons which will surely lead to interstellar war.
The Forge (1)
E7
The Forge (1)Earth's embassy on Vulcan is bombed, and the ensuing investigation puts Archer and T'Pol on the trail of a Vulcan religious faction hiding in a treacherous desert.
Awakening (2)
E8
Awakening (2)T'Pol and Archer confront the Syrrannites and meet T'Pau who denies the embassy bombing. Archer, who has Surak's essence, is asked to help. V'Las threatens Enterprise to make sure an attack on the Syrrannites isn't witnessed.
Kir'Shara (3)
E9
Kir'Shara (3)Archer, T'Pol and T'Pau attempt to bring the Kir'Shara — an artifact believed to contain Surak's original writings — to the Vulcan capital, as the NX-01 gets involved in a Vulcan-Andorian military clash.
Daedalus
E10
DaedalusDr. Emory Erickson, the father of transporter technology and old friend of Archer's father tricks Enterprise into helping him retrieve his son, Quinn. The crew reluctantly follows Erickson's lead as he tries to re-materialize Quinn from a phantom-like state stemming from a transporter accident 15 years ago.
Observer Effect
E11
Observer EffectNon corporeal aliens study the Enterprise crew as they respond to a fatal viral infection brought on board from an away mission.
Babel One (1)
E12
Babel One (1)Enterprise escorts Tellarites to peace talks with Andorians. While transporting they rescue Andorians and say the Tellarites attacked them. Enterprise is soon attacked by an Andorian ship, and Archer must prove who is responsible.
United (2)
E13
United (2)Archer tries to unify the Andorians, Tellarites and Vulcans in a plan to capture a marauder ship threatening to destabilize the region.
The Aenar (3)
E14
The Aenar (3)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 (1)
E15
Affliction (1)While Enterprise is visiting Earth, Phlox is abducted by the Klingons and forced to research a cure for a virus destined to wipe out the race. Reed is tapped by a secret agency and ordered to betray Archer. Trip transfers to the Columbia.
Divergence (2)
E16
Divergence (2)Picking up from the cliffhanger Affliction (2005), Enterprise's engine is sabotaged and near overload. The Columbia sends Trip to reboot the reactor. Phlox rushes to cure Klingon plague before the forced sterilization of the colony. With Reed in the brig, Archer contacts Harris for answers to the Lieutenant's betrayal.
Bound
E17
BoundAs a gift for negotiating with the Orion Syndicate, Captain Archer receives three Orion Slave Girls.
In a Mirror, Darkly (1)
E18
In a Mirror, Darkly (1)Set in the dark and oppressive Mirror Universe, Commander Archer leads a mutiny in a bold attempt to seize control of an advanced starship - a vessel from the future that may be the key to saving the Terran Empire.
In a Mirror, Darkly (2)
E19
In a Mirror, Darkly (2)The Mirror Universe saga concludes as Archer declares himself captain of a formidable starship from the future, while his alien crew launch a rebellion in a desperate bid to keep him from achieving ultimate power.
Demons (1)
E20
Demons (1)While attending a conference on a proposed interplanetary alliance, Trip and T'Pol find out from a dying woman that they have a baby. Investigation shows the woman was a member of the xenophobic organization Terra Prime.
Terra Prime (2)
E21
Terra Prime (2)A human isolationist leader threatens to destroy Starfleet Command unless all aliens leave Earth immediately.
These Are the Voyages...
E22
These Are the Voyages...Six years in the future, an emotional Captain Archer and the crew return to Earth to face the decommission of Enterprise and signing of the Federation charter.