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.

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 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.

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

Captain Kirk has a second run-in with the conman, Harry Mudd. Mudd is now the supreme ruler of a planet of androids who cater to his every whim.

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…

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

The crew of the Enterprise are held captive by an alien who turns out to be the Greek god Apollo.

The Enterprise is in danger when Janice Lester, one of Kirk’s former lovers, steals his body.

The Enterprise picks up a group of space “”hippies”” looking for Eden.

The crew of the Enterprise encounter an immortal human in this science fiction variation on Shakespeare’s The Tempest.

Strange incorporeal aliens threaten the Memory Alpha station and the Enterprise.

Kirk, McCoy, and Sulu are stranded on a barren planet where a mysterious woman attempts to kill them one at a time, while the Enterprise must travel halfway across the…

The Enterprise encounters two duo-chromatic and mutually belligerent aliens who put the ship in the middle of their old conflict

Captain Kirk faces off with a demented shape-shifting starship captain determined to control the universe.

The USS Enterprise ferries a spoiled princess whose betrothal to a royal Troyian is hoped will bring peace to a star system at war.

While visiting a doomed planet, the landing party is subject to torturous experiments by powerful aliens.

Invisible “time-accelerated” aliens take over the Enterprise and attempt to abduct the crew for use as “genetic stock”.

Captain Kirk is caught between dimensions while the crew of the Enterprise works to retrieve him. All the while, the Tholians demand that the Enterprise leave their space.

An alien force drives the crew of the Enterprise into brutal conflict with the Klingons.

Having been found trespassers into Melkotian space, Captain Kirk and his companions are sent to die in a re-enactment of the gunfight at the O.K. Corral.

The Enterprise travels with an alien ambassador whose appearance induces madness.

On a distant planet, Kirk, Spock and McCoy find a scientific team dead, and their children who, unknown to the crew, have great powers at their disposal.

An alien device on a primitive planet erases Captain Kirk’s memory, and he begins a new life with the planet’s indigenous people.

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

An alien female beams aboard the ship and, after incapacitating the rest of the crew, surgically removes Spock’s brain. Kirk and the crew have just hours to locate and replace…