Watch Star Trek Season 3 Full Episodes

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

Kirk, Spock, and McCoy become trapped in the past of another world.

Kirk and Spock meet Abraham Lincoln and Surak of Vulcan and must do battle with some of histories most terrible villians.

Kirk must resolve a mining dispute on a the cloud city of Stratos to acquire the resources to cure a space plague.

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

While seeking a cure for a fever ravaging the Enterprise, Kirk and Spock encounter Flint, a hermit-like Earthman, and his beautiful young ward.

The Enterprise must deal with discorporeal cloud-like corporeal aliens who have already destroyed the inhabitants of a library planet and plan to...

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...

Kirk beams down on a diplomatic mission...and finds himself in an Enterprise where all the crew have vanished and only a mysterious woman resides.

The Enterprise finds itself host to two alien beings from the same planet, who share an intense and self-destructive hatred of each other.

Kirk and Spock investigate an insane asylum where a former Starfleet captain is being held, only to discover that he has freed the inmates and is...

The Enterprise must escort an alien princess to her marriage to seal an interplanetary alliance...but she becomes attracted to Kirk.

On a planet doomed to destruction, Kirk, Spock & McCoy become involved with two aliens who use them as laboratory animals in a bizarre series of...

Stardate 5710.5: When a landing party investigating Scalos begins to vanish one by one, Kirk, Spock and McCoy try to find out what is happening...

Kirk and his crew find themselves at the mercy of powerful individuals who possess mind-over-matter powers...and plan to use the Enterprise crew for...

Stardate 5693.2: The Enterprise arrives at the last known position of the U.S.S. Defiant (NCC-1764), an area of uncharted space, to search for the...

The Enterprise must deflect an asteroid on a collision course with an inhabited planet...but discover the asteroid is a spaceship with a population...

When the Enterprise brings aboard Klingon prisoners, an alien entity pits both sides against each other in an ever-escalating struggle.

When coming to an exaphobic isolationist planet, Captain Kirk and his landing party are punished for trepassing. They are sentenced to death in a...

Stardate 5630.7:...or is there in beauty no truth? Miranda Jones, a telepath who studied mental disciplines on Vulcan, arrives with Ambassador Kolos,...

The Enterprise travels to a planet where a scientific team has killed themselves...except for the children, who began to act oddly.

Stardate 4842.6: Kirk, Spock and McCoy beam down to a planet to inform any inhabitants that they must evacuate the planet due to an approaching...

An unusually tense and irritable Kirk orders his ship into the Romulan Neutral Zone, where it is promptly surrounded. Beamed to a Romulan ship, Kirk...

Stardate 5431.4: The Enterprise is intercepted by a starship of unknown design and a woman from the ship beams directly into the bridge and uses a...