The Enterprise crew finds witches, black cats, and haunted castles on planet Pyris 6.

Kirk, Spock, and McCoy shuttle is pulled off coarse by Companion, to a planetoid only to find Zefram Cochrane still alive and being carded for by Companion.

The Enterprise crew becomes embroiled in a power struggle on planet Capella 4 when Klingons attempt to gain mining rights there.

The Enterprise is captured by a powerful alien who was once worshipped on planet Earth as the Greek god Apollo.

Spock experiences Pon Farr, the Vulcan mating drive, and must return home to take a mate, or die.

An ancient weapon that destroyed the civilization that created it started destroying planets in Federation space.

Scotty is accused of killing 2 women, but it is later proved it was Jack the Ripper.

Nomad, an ancient space probe launched from Earth centuries ago returns and starts it's mission to destroy all nonperfect life. It later destroys itself when Kirks points out on of its imperfections.

The Enterprise encounters a primitive humanoid culture on an Eden-like planet controlled by a machine god known as Vaal.

A transporter accident sends Kirk and company into a savage mirror universe.

Exposure to an unknown type of radiation causes the Enterprise crew to age very rapidly.

Harry Mudd returns, now the ruler of a planet you is made up of androids.

The Enterprise stops at Deep Space Station K9 where a small, furry animal is given to Uhura as a gift. The Tribbles soon over run the Enterprise as well an eating the entire station's supply of grain.

Kirk, Spock, and McCoy are captured on a planet like Earth, on which the Roman empire never fell.

Sarak, Spock's father, suffers a heart attack while on board the Enterprise, and Spock must save his life.

The peaceful society is destroyed when the Klingons provide fire arms to the inhabitants.

Enteprise crew members are abducted and forced to fight to the death for the amusement of gamesters who gamble on the results.

Kirk is determined to destroy a vampire cloud creature that killed 200 people on his first Starfleet assignment, deaths he felt he could have saved.

A giant space amoeba threatens the universe.

The Enterprise visits a planet whose inhabitants have patterned themselves after Chicago gangsters of the late 1920s on Earth.

Aliens from the Addromeda galaxy hijack the Enterprise, but they are unfamiliar with the human forms they have assumed for this mission.

2 lovers and enemy from a race that died half a million years ago "borrow" Kirk, and Spocks bodies so they can build android bodies for themselves.

The Enterprise investigates a planet where a sociologist's experiment has gone wrong and transformed the government into the equivalent of Nazi, Germany's government.

Damstom's M5 computer replaces Kirk as captain of the Enterprise.

The Enterprise finds a planet where survivors of a bacteriological holocaust.

The Enterprise travels back in time to 1968, to help a man named Gary Sevel avert a nuclear crisis.