Enterprise has a group of aliens watching a stellar phenomenon on board. When the ship is miraculously saved from blowing up, crewman Daniels has an important message for Archer.

After an attack by a mysterious ship, Archers orders Enterprise's return to Jupiter to install phase cannons; Hoshi makes plans for Malcolm's birthday.

When Enterprise encounters a ship of Vulcan pilgrims, T'Pol is convinced by one of them to perform a Vulcan mind meld.

Almost the entire crew is left unconscious when four Ferengi pirates raid Enterprise. A still conscious Trip is the only one who can get rid of them.

Enterprise is for the second time on its way to Risa when yet again another urgent matter comes up: a distress call. It comes from a small vessel. The owner, Zobral, is extremely happy with the help from Enterprise and invites Captain Archer to his home world for a good meal and a game of Geskana. When Archer and Trip have landed on the desert planet, Enterprise gets a message from the Torothan Chancellor Trelit. He says Zobral isn't as nice a man as captain Archer thinks.

Enterprise discovers a mining colony of the Paraagans. The crew gets an invitation for a meeting on the surface and a shuttle pod tries to break through the atmosphere. All of a sudden just under the shuttle a giant explosion begins and scorches the earth beneath. All 3600 colonists are reported dead. After examination, Enterprise finds out plasma leaking from the pod's vents ignited tetrazine in the atmosphere. Lieutenant Reed, however, ensures he closed the plasma vents before the shuttle went of. After conversations with admiral Forrest of Starfleet Command, Captain Archer learns that Enterprise's mission is canceled and they must return home, not to return to space for another ten or twenty years. When the ship has altered course, crewman Daniels, a time traveler, pays a visit to captain Archer.

The safety of Enterprise rests on Reed's shoulders when the ship becomes trapped in a Romulan minefield and Romulan ships are closing in on them.

Enterprise seeks repairs from their encounters with the Romulans, where they stop at a desolate but idyllic repair station. But all is not what it seems when Mayweather is suddenly found dead.

T'Pol asks Captain Archer to join her on a mission to capture a Vulcan fugitive that escaped her years ago.

T'Pol must save the ship after the crew becomes obsessed with trivialities during the approach to a black hole.

After receiving a warning about a radioactive storm approaching Enterprise, the crew is forced to take shelter in the ship's catwalk.

Enterprise discovers a pod with the body of a human that seems to be wanted by both Sulibans and Tholians.

An Arctic research team makes a startling find: cybernetic creatures - Borg - buried in the ice. When the revived aliens seize control of a spacecraft, it's up to Archer to keep them from contacting the Collective and threatening Earth.

After an attack by Osaarian pirates, Enterprise follows them to a mysterious sphere.

Enterprise helps an alien woman, Rajiin, seeking to escape her life as a sex slave. Once on board she uses her alien abilities to gather biometric data about humans and is recaptured by her employers, the Xindi council.

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.

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. Now, Archer learns that he may be the key to undoing this tragedy.

Archer and the Xindi Degra are in a shuttle. With Degra suffering from memory loss, Archer tells him they escaped together from a prison and that the Insectoids took power after destroying Earth.

Captain Archer has been returned to Enterprise by the Xindi council awaiting a hearing. But after a heavy attack by the Reptilians, Enterprise is stranded without a functional warp drive. They meet another ship in trouble because of space anomalies. The ship's captain isn't willing to trade in their warp coil and Archer must make a tough decision. Meanwhile T'Pol is having some strange sensations and can't control her emotions.

The Augments are on their way to Cold Station 12, where Augments embryos are kept.

While Enterprise travels to Andoria to warn them of the attack, Archer tries to bring the Kir'Shara to the High Command.

The men of Enterprise fall under the seductive control of three Orion women. Trip is the only male member of the crew not to succumb to the women.

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 2370, Commander William T. Riker is trying to clear his mind and relives the last mission of the first Enterprise on the holodeck.