Star Trek: Enterprise: Season 4
| # | Air Date | Title |
| 1 | Oct 08 2004 |
Storm Front (1)Archer and the NX-01 find themselves in Earth’s past, with events of World War II altered by the Temporal Cold War. |
| 2 | Oct 15 2004 |
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. |
| 3 | Oct 22 2004 |
HomeOnce the NX-01 finally returns to Earth, the weary crewmen face repercussions of their journeys, both positive and negative. |
| 4 | Oct 29 2004 |
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. |
| 5 | Nov 05 2004 |
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.<… |
| 6 | Nov 12 2004 |
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. |
| 7 | Nov 19 2004 |
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.<… |
| 8 | Nov 26 2004 |
Awakening (2)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. |
| 9 | Dec 03 2004 |
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… |
| 10 | Jan 14 2005 |
DaedalusThe inventor of the transporter, Emory Erickson, comes aboard Enterprise for a risky experiment. |
| 11 | Jan 21 2005 |
Observer EffectNon corporeal aliens study the Enterprise crew as they respond to a fatal viral infection brought on board from an away mission. |
| 12 | Jan 28 2005 |
Babel One (1)Enterprise journeys to Babel with a Tellarite ambassador on board for peace talks with the Andorians, when a distress call from Shran is received. |
| 13 | Feb 04 2005 |
United (2)Archer tries to unify the Andorians, Tellarites and Vulcans in a plan to capture a marauder ship threatening to destabilize the region. |
| 14 | Feb 11 2005 |
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. |
| 15 | Feb 18 2005 |
Affliction (1)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. |
| 16 | Feb 25 2005 |
Divergence (2)With Columbia’s help, the Enterprise crew grapples with sabotage to their ship as they pursue the truth behind the kidnapping of Phlox. |
| 17 | Apr 15 2005 |
BoundAs a gift for negotiating with the Orion Syndicate, Captain Archer receives three Orion Slave Girls. |
| 18 | Apr 22 2005 |
In a Mirror, Darkly (1)In the mirror universe, Commander Archer mutinies against Captain Forrest in order to capture a future Earth ship found in Tholian space. |
| 19 | Apr 29 2005 |
In a Mirror, Darkly (2)In the mirror universe, Archer commandeers the 23rd-century Defiant from the Tholians and uses it in a nefarious power grab. |
| 20 | May 06 2005 |
Demons (1)A xenophobic faction of humanity threatens to undermine talks to form a new coalition of planets. |
| 21 | May 13 2005 |
Terra Prime (2)A human isolationist leader threatens to destroy Starfleet Command unless all aliens leave Earth immediately. |
| 22 | May 13 2005 |
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. |