1-25: The Devil in the Dark

An incident on the edge of the galaxy transforms two crew members, one of whom is a long-time friend of Captain Kirk.

A planet, home to Kirk's brother and nephew, is under attack by unique creatures.

Enterprise encounters a species fighting a deadly war with computers.

The crew becomes entranced from the pollen of a mysterious flower.

Enterprise encounters Lazarus, whose behavior is representative of two drastically different personalities.