1-23: A Taste of Armageddon
Enterprise encounters a species fighting a deadly war with computers.
1-24: This Side of Paradise
The crew becomes entranced from the pollen of a mysterious flower.
1-26: Errand of Mercy
Kirk and Spock try to protect a seemingly primitive species from a Klingon invasion.
1-05: The Enemy Within
A transporter malfunction creates two distinctly opposite Kirks.