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.

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

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 it before Spock's body dies.

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

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

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

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

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

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

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

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

A race of overpopulated aliens abduct Captain Kirk to solve their problem.

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 galaxy to rescue them.

Aliens force Captain Kirk and First Officer Spock to join forces with "Abraham Lincoln" and "Surak" to battle villains in a contest of good vs. evil.

Charlie Evans, the sole survivor of a transport crash, is transferred to the Enterprise from a different ship. Why are they so eager to rid themselves of him, though? There's more to Charlie than meets the eye...

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

The Enterprise crew take shore leave on a peaceful, pastoral planet... where their dreams and fantasies come to life.

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

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

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

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.

Kirk and a landing party are stranded on a planet due to a disease that causes any adult to die a painful death, and must deal with the local children who have survived.

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

The crew of the Enterprise discovers Klingon interference in the development of a formerly peaceful planet and is forced to help maintain a balance of power.

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