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

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

Spock commands a stranded away team when their shuttlecraft is stranded on a planet with hostile natives.

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…

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

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,…

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

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