Star Trek: Enterprise - Season 4

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.

22 Episodes

Storm Front (1)

Season 4 - Episode 1

Archer and the NX-01 find themselves in Earth's past, with events of World War II altered by the Temporal Cold War.

Storm Front (2)

Season 4 - Episode 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

Season 4 - Episode 3

Once the NX-01 finally returns to Earth, the weary crewmen face repercussions of their journeys, both positive and negative.

Borderland (1)

Season 4 - Episode 4

When genetic supermen left over from the Eugenics Wars hijack a Klingon ship, Archer must rely on their creator, the criminal Dr. Arik Soong...

Cold Station 12 (2)

Season 4 - Episode 5

Arik Soong leads his band of Augments to a medical facility where hundreds of genetically enhanced embryos are still stored, intending to re...

The Augments (3)

Season 4 - Episode 6

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)

Season 4 - Episode 7

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 i...

Awakening (2)

Season 4 - Episode 8

Archer and T'Pol encounter the Syrrannites, a radical group hiding in the Vulcan desert, while the NX-01 crew contends with Vulcan power plo...

Kir'Shara (3)

Season 4 - Episode 9

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, ...

Daedalus

Season 4 - Episode 10

The inventor of the transporter, Emory Erickson, comes aboard Enterprise for a risky experiment.

Observer Effect

Season 4 - Episode 11

Non corporeal aliens study the Enterprise crew as they respond to a fatal viral infection brought on board from an away mission.

Babel One (1)

Season 4 - Episode 12

Enterprise journeys to Babel with a Tellarite ambassador on board for peace talks with the Andorians, when a distress call from Shran is rec...

United (2)

Season 4 - Episode 13

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)

Season 4 - Episode 14

Archer visits Shran's icy homeworld to find an Andorian subspecies called the Aenar, to determine their connection to the marauder destroyin...

Affliction (1)

Season 4 - Episode 15

While Enterprise visits Earth for the launch of Columbia, Phlox is kidnapped and forced to help the Klingons deal with a grave threat toward...

Divergence (2)

Season 4 - Episode 16

With Columbia's help, the Enterprise crew grapples with sabotage to their ship as they pursue the truth behind the kidnapping of Phlox.

Bound

Season 4 - Episode 17

As a gift for negotiating with the Orion Syndicate, Captain Archer receives three Orion Slave Girls.

In a Mirror, Darkly (1)

Season 4 - Episode 18

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 (2)

Season 4 - Episode 19

In the mirror universe, Archer commandeers the 23rd-century Defiant from the Tholians and uses it in a nefarious power grab.

Demons (1)

Season 4 - Episode 20

A xenophobic faction of humanity threatens to undermine talks to form a new coalition of planets.

Terra Prime (2)

Season 4 - Episode 21

A human isolationist leader threatens to destroy Starfleet Command unless all aliens leave Earth immediately.

These Are the Voyages...

Season 4 - Episode 22

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 ...