These Are the Voyages: In 2370, Commander William T Riker is trying to clear his mind and relives the last mission of the first Enterprise on the holodeck. Series finale. (S4, ep 22) [S]
Terra Prime: Paxton threatens to destroy Starfleet HQ if all aliens refuse to leave Earth. Enterprise jump into action to shut down the verteron array on Mars. (S4, ep 21) [S]
Demons: While attending a conference on a proposed interplanetary alliance, Trip and T'Pol find out from a dying woman that they have a baby. (S4, ep 20) [S]
In a Mirror, Darkly Part 2: The Mirror Universe saga concludes as Archer declares himself captain of a starship from the future, while his alien crew launch a rebellion. (S4, ep 19) [S]
In a Mirror, Darkly Part 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. (S4, ep 18) [S]
Divergence: While Enterprise tries to bring Trip on board to reverse the Klingon modifications, Phlox and Antaak find a cure for the virus that will not please General K'Vagh. (S4, ep 16) [S]
Affliction: 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 human race. (S4, ep 15) [S]
Babel One: Enterprise supervises peace talks between the Tellarites and the Andorians. But when they are attacked, Archer must prove who is responsible. (S4, ep 12) [S]
Observer Effect: Noncorporeal aliens inhabit the bodies of Enterprise crew members to study how they react to a lethal infection that has affected Trip and Hoshi. (S4, ep 11) [S]
Awakening: 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. (S4, ep 8) [S]
The Forge: 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. (S4, ep 7) [S]
Cold Station 12: Arik Soong leads his band of Augments to a medical facility where hundreds of genetically enhanced embryos are still stored. Is he about to revive them? (S4, ep 5) [S]
Borderland: When genetic supermen left over from the Eugenics Wars hijack a Klingon ship, Archer must rely on their creator, the criminal Arik Soong, to hunt them down. (S4, ep 4) [S]
Home: The crew receive a heroes' welcome after returning to Earth following their year-long mission in the Delphic Expanse. Back on home turf, they take stock in different ways. (S4, ep 3) [S]
Storm Front, Part 2: As the Nazi invasion of the US continues in an altered 1944, Archer and his crew map out their strategy to stop Vosk from building a dangerous time machine. (S4, ep 2) [S]
Storm Front: The crew find themselves trapped in an alternative 1944 - where the Allied forces are losing WWII and the Nazis have invaded the USA. (S4, ep 1) [S]
The Council: As T'Pol and Reed go on a harrowing mission into one of the mysterious metallic Spheres, Archer and Hoshi approach the Xindi Council hoping to make peace. (S3, ep 22) [S]
Azali Prime: Archer decides he should pilot a kamikaze shuttle to destroy the Xindi weapon. Temporal agent Daniels urges him to reconsider. (S3, ep 18) [S]
Stratagem: Archer and the Xindi Degra are in a shuttle. With Degra suffering from memory loss, Archer tells him they escaped together from a prison. (S3, ep 14) [S]
Carpenter Street: Archer and T'Pol travel back in time to Detroit in 2004 to stop three Xindi-Reptilians from constructing a bioweapon. (S3, ep 11) [S]
Twilight: His memory crippled, Archer awakens years in the future, after the Xindi have reduced Earth to a cinder and the remnants of humanity have settled on a distant planet. (S3, ep 8) [S]
The Shipment: Enterprise follows a lead and discovers a Xindi lab that refines Kemocite, the key ingredient in the weapon being built to destroy Earth. (S3, ep 7) [S]
Exile: Hoshi Sato is contacted by a 400-year-old telepathic alien exiled on planet in the Expanse, shunned by his society because of his abilities. (S3, ep 6) [S]
Impulse: Enterprise answers a distress signal from a stranded Vulcan ship, only when arriving they find the ship completely desolate, wrecked and filled with Vulcan zombies. (S3, ep 5) [S]
The Xindi: Enterprise search for any intel about the Xindi. T'Pol helps Trip's insomnia with Vulcan therapy. Archer and Trip find another race of Xindi imprisoned in a mine. (S3, ep 1) [S]
The Expanse: An alien probe launches a devastating attack on Earth. Archer, still being hunted by the Klingons, brings the Enterprise back home to investigate. (S2, ep 26) [S]
Bounty: After exploring an uninhabited planet, Captain Archer is taken prisoner by a Tellarite bounty hunter who was hired by the Klingons to return Archer to Qo'noS. (S2, ep 25) [S]
First Flight: After his close friend, A G Robinson, is killed in a mountain climbing accident, Captain Archer tells T'Pol about the Warp Two test flight almost 10 years ago. (S2, ep 24) [S]
Cogenitor: Enterprise encounters a hyper-giant star. While there, they make first contact with the Vissians - a technologically sophisticated race with three genders. (S2, ep 22) [S]
The Breach: Enterprise attempts to retrieve three Denobulan scientists from the planet Xantoras, where the Government has ordered all off-worlders to evacuate. (S2, ep 21) [S]
Horizon: Mayweather temporarily leaves Enterprise to visit the cargo ship Horizon, where he was born and raised. The Enterprise crew observes an unusual planetary event. (S2, ep 20) [S]
Judgement: After Enterprise lends aid to a group of accused rebels, Captain Archer faces a tribunal and charges of conspiring against the Klingon Empire. (S2, ep 19) [S]
Canamar: Archer and Trip are accused of smuggling and sent to the penal colony Canamar. While Enterprise negotiates their release, a mutiny breaks out on the prison ship. (S2, ep 17) [S]
Stigma: T'Pol is diagnosed with a possibly fatal neurological disease as a result of a mind meld. Meanwhile, one of Phlox's wives visits Enterprise. (S2, ep 14) [S]
Dawn: Trip's shuttlepod is shot down by a hostile race and is forced to land on a deserted moon. There, he must team up with the alien who shot him down. (S2, ep 13) [S]
The Catwalk: After receiving a warning about a radioactive storm approaching Enterprise, the crew is forced to take shelter in the ship's catwalk. (S2, ep 12) [S]
Precious Cargo: While Trip is repairing a stasis pod at a Retellian cargo ship and the woman inside wakes up, the ship is forced to make a hasty departure. (S2, ep 11) [S]