1-25: The Devil in the Dark
The Enterprise encounters a silicone-based life-form who is attacking pergium miners.
1-29: Operation: Annihilate!
A planet, home to Kirk's brother and nephew, is under attack by unique creatures.
1-03: Where No Man Has Gone Before
An incident on the edge of the galaxy transforms two crew members, one of whom is a long-time friend of Captain Kirk.