As of July 2026, Star Trek: Enterprise Season 4 aired in 2004 with 22 episodes — streaming now on Paramount Plus. Full episode guide and where to watch below.
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Star Trek: Enterprise Season 4

2004 22 Episodes Sci-Fi & Fantasy · Action & Adventure ⭐ 8/10

Right now you can watch Star Trek: Enterprise Season 4 on and — and it goes further with its ideas than most genre entertainment bothers to. A compact run that never overstays its welcome. 957 viewers have already rated it on TMDB — the kind of consensus that does not happen by accident. Watch it for Scott Bakula — the performance elevates material that could easily tip into self-seriousness. Put it on tonight and see for yourself.

There is a reason Star Trek: Enterprise Season 4 keeps coming up in conversation. The world-building is meticulous, but it is the characters who carry Star Trek: Enterprise Season 4 through its more ambitious moments. 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. Scott Bakula and Jolene Blalock lead a cast that brings real weight to the material. It was aired in 2004. The rules of Star Trek: Enterprise Season 4's world are consistent enough that the big swings never feel like cheating. It rarely drops the ball, and when it does, it recovers fast.

Star Trek: Enterprise Season 4 is satisfying on multiple levels — something to watch and something to think about after. It stands on its own even without an obvious comparison point. The complete run is available and best experienced without too much prior knowledge of where it goes. Scott Bakula anchors it with a performance that makes the more abstract moments feel personal. If you have been burned by ambitious sci-fi before, this is the exception.

📡 Where to Watch Star Trek: Enterprise Season 4

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🇺🇸 United States
🇬🇧 United Kingdom
🇨🇦 Canada
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🎬 Star Trek: Enterprise Season 4 — Episode Guide

E1
Storm Front (1)
2004-10-08
Archer and the NX-01 find themselves in Earth's past, with events of World War II altered by the Temporal Cold War.
E2
Storm Front (2)
2004-10-15
With Silik's help, Archer hones in on the temporal operative who altered Earth's past and threatens to destroy all of time.
E3
Home
2004-10-22
Once the NX-01 finally returns to Earth, the weary crewmen face repercussions of their journeys, both positive and negative.
E4
Borderland (1)
2004-10-29
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.
E5
Cold Station 12 (2)
2004-11-05
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.
E6
The Augments (3)
2004-11-12
In defiance of their "father," Arik Soong's Augments devise a heinous plot against the Klingons which will surely lead to interstellar war.
E7
The Forge (1)
2004-11-19
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.
E8
Awakening (2)
2004-11-26
Archer and T'Pol encounter the Syrrannites, a radical group hiding in the Vulcan desert, while the NX-01 crew contends with Vulcan power ploys.
E9
Kir'Shara (3)
2004-12-03
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.
E10
Daedalus
2005-01-14
The inventor of the transporter, Emory Erickson, comes aboard Enterprise for a risky experiment.
E11
Observer Effect
2005-01-21
Non corporeal aliens study the Enterprise crew as they respond to a fatal viral infection brought on board from an away mission.
E12
Babel One (1)
2005-01-28
Enterprise journeys to Babel with a Tellarite ambassador on board for peace talks with the Andorians, when a distress call from Shran is received.
E13
United (2)
2005-02-04
Archer tries to unify the Andorians, Tellarites and Vulcans in a plan to capture a marauder ship threatening to destabilize the region.
E14
The Aenar (3)
2005-02-11
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.
E15
Affliction (1)
2005-02-18
While Enterprise visits Earth for the launch of Columbia, Phlox is kidnapped and forced to help the Klingons deal with a grave threat toward their species.
E16
Divergence (2)
2005-02-25
With Columbia's help, the Enterprise crew grapples with sabotage to their ship as they pursue the truth behind the kidnapping of Phlox.
E17
Bound
2005-04-15
As a gift for negotiating with the Orion Syndicate, Captain Archer receives three Orion Slave Girls.
E18
In a Mirror, Darkly (1)
2005-04-22
In the mirror universe, Commander Archer mutinies against Captain Forrest in order to capture a future Earth ship found in Tholian space.
E19
In a Mirror, Darkly (2)
2005-04-29
In the mirror universe, Archer commandeers the 23rd-century Defiant from the Tholians and uses it in a nefarious power grab.
E20
Demons (1)
2005-05-06
A xenophobic faction of humanity threatens to undermine talks to form a new coalition of planets.

🎭 Cast of Star Trek: Enterprise Season 4

Scott Bakula
Scott Bakula
Jonathan Archer
Jolene Blalock
Jolene Blalock
T'Pol
Connor Trinneer
Connor Trinneer
Charles 'Trip' Tucker III
John Billingsley
John Billingsley
Phlox
Dominic Keating
Dominic Keating
Malcolm Reed
Linda Park
Linda Park
Hoshi Sato
Anthony Montgomery
Anthony Montgomery
Travis Mayweather

📋 All Seasons of Star Trek: Enterprise

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