A mysterious signal from an unexplored planet mesmerizes the male crewmen of the Enterprise into daydreaming of fantasy women. Female crewmen remain unaffected. Following ...

The crew of the Enterprise must stop a living planet-consuming cloud before it attacks an inhabited world. ...

Upon his return from a journey through the Guardian of Forever Kirk realizes that history has been altered and no one remembers Spock. An Andorian is now his First Office ...

The Enterprise finds an ancient abandoned starship with a malevolent entity aboard, eager to take over the Starfleet ship. ...