Kirk and Spock must travel into the past in order to correct a change that will alter history.

A transporter mishap swaps Captain Kirk and his companions with their evil counterparts in a parallel universe. In the so-called Mirror Universe, the Enterprise is a ship of the Terran Empire, an organization as evil as the United Federation of Planets is benevolent.

The Enterprise picks up a crew of genetic supermen from the 20th century... and their leader, Khan, plans to create a new empire.

Kirk pits the Enterprise against an invisible spaceship testing the Federation's defenses.

First Officer Spock returns to his home world for a brutal Vulcan mating ritual.

The Enterprise must protect a very important shipment of grain from both Klingons and some adorable creatures called tribbles.

The starship Enterprise and its heavily-damaged sister ship, the USS Constellation, must work together to stop an alien planet-killing machine headed for the heart of Federation territory.

The Enterprise must transport dignitaries to a peace conference, with an assassin on the loose.

The Federation and the Klingon Empire teeter on the brink of war as Kirk investigates Organia, a humble planet, inhabited by pacifists, that is unwittingly caught in the middle.

The Enterprise arrives at a planet to establish diplomatic relations and finds itself in the middle of a "peaceful" war that threatens to destroy the ship.

Kirk investigates a series of grisly murders on a mining planet that are the work of a seemingly hostile alien creature.

Spock's court-martial continues as he attempts to justify his abduction of Pike, the theft of the Enterprise, and his heading for a planet declared forbidden by Starfleet.

A skeleton Enterprise crew are assigned to test a revolutionary computer system that is given total control of the ship.

Spock kidnaps his former captain, the crippled Christopher Pike, and heads for a quarantined planet, putting his career and Kirk's life on the line.

The Enterprise crew try to rescue colonists from deadly radiation, but instead encounter strange alien spores that seem to offer paradise.

The crew of the Enterprise are on a secret mission to steal a Romulan cloaking device.

The crew of the USS Enterprise deals with an indestructible planet-destroying space probe.

The crew of the Enterprise tracks down a Federation observer on a planet dominated by a "Naziesque" regime.

Beings from another galaxy commandeer the Enterprise in an attempt to return home.

Kirk, Spock and McCoy are trapped in two parts of another planet's past - a world threatened with destruction when its sun goes supernova.

The Enterprise encounters a vast alien ship that threatens the Enterprise with destruction.

Strange radiation exposes the command crew of the Enterprise to the effects of rapid aging.

The crew of the Enterprise encounters an energy-draining field which may be able to destroy the galaxy.

In a freak accident the Enterprise is sent back to 20th century Earth, and must find their way back without changing history.

The Enterprise visits a planet with an Earth-like 1920s gangster culture.