Kirk and the Enterprise must combat parasitic aliens.

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

Kirk and Spock encounter an alien named Lazarus who claims to be from an anti-matter universe.

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

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

The Enterprise crew is trapped in paradise when they come to rescue colonists who have fallen to pacifying alien spores and become infected themselves.

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.

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

The Enterprise encounters a seemingly peaceful civilization run by a “”benevolent”” being named Landru…who intends for them to join his people.

When a mysterious alien race destroy an Earth colony, the Enterprise pursues but Kirk and the alien captain are forced to fight each other by powerful aliens.

The Enterprise finds itself at the mercy of a seemingly omnipotent being who fancies himself a 18th century Englishman.

Kirk is one of the last survivors who can identify a mass killer, who lurks among a Shakespearean troupe aboard the Enterprise.

The Enterprise encounters a vast alien ship that sets out to test them.

Kirk investigates an experimental facility for holding prisoners and finds a sinister scheme.

Nurse Christine Chapel is reunited with her old fiance on Exo III, but the scientist has plans for Captain Kirk and the Federation.

The Enterprise picks up a intergalactic conman, Harry Mudd, and three incredibly beautiful women who harbor a dark secret.

A transporter malfunction causes Captain Kirk to split into his “good” and “evil” selves, and a landing party will freeze to death if they don’t merge the two back together.

A strange alien substance causes the crew to act out their deepest inhibitions, while the ship plummets out of orbit.

While exploring the edge of the galaxy, the Enterprise encounters an energy barrier that gives two crewmen godlike powers.

Captain Kirk must learn the limits to the power of a 17-year-old boy with the psychic ability to create anything and destroy anyone.

Kirk and his crew are at deadly risk from an alien creature that feeds on the salt in a human body and can take on any form.

The Enterprise crew investigates the disappearance of a ship’s crew on a planet that is a modern version of the Roman Empire.

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

Captain Kirk must find the cure to a deadly disease and put an end to another Starfleet captain’s cultural interference.

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

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

Telepathic aliens take control of Captain Kirk’s and First Officer Spock’s bodies.

The crew of the Enterprise discovers Klingon interference in the development of a formerly peaceful planet and joins them in what becomes an arms race.

The crew of the Enterprise encounters an energy-draining space creature.

The Enterprise visits a planet with an Earth-like 1920s gangster culture, with Runyonesque dialog and costumes.

Captain Kirk and his companions are abducted into slavery and trained to fight as gladiators for the gambling entertainment of three disembodied beings.

The ship travels to Deep Space Station K7 to guard a consignment of grain bound for Sherman’s Planet. On arrival, a trader named Cyrano Jones gives Lt. Uhura a tribble,…

A series of bizarre murders points to Mr. Scott as the prime suspect.

Captain James T. Kirk becomes obsessed with destroying a deadly entity he once encountered in his youth.

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

The crew of the Enterprise become entangled in a planet’s tribal power struggle.

A shuttle crew from the USS Enterprise encounters a man out of history and his mysterious alien companion.

Two powerful aliens threaten the well-being of the Enterprise and her crew.

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 crew of the Enterprise visits a mysterious paradisical planet controlled by a computer that is served by the local inhabitants.