Star Trek: The Original Series – Season 1
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.
1-05: The Enemy Within
A transporter malfunction creates two distinctly opposite Kirks.
1-06: Mudd’s Women
The Enterprise rescues known criminal Harry Mudd and his mysterious female companions.
1-07: What Are Little Girls Made Of?
The Enterprise finds Nurse Chapel's long-lost fiance, Dr. Roger Korby, living isolated with advanced androids.
On a planet resembling 1960s Earth, all of the adults have perished from a deadly disease.
1-10: The Corbomite Maneuver
The Enterprise fights against a seemingly unstoppable force.
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.
1-25: The Devil in the Dark
The Enterprise encounters a silicone-based life-form who is attacking pergium miners.
1-26: Errand of Mercy
Kirk and Spock try to protect a seemingly primitive species from a Klingon invasion.
1-27: The Alternative Factor
Enterprise encounters Lazarus, whose behavior is representative of two drastically different personalities.
1-28: The City on the Edge of Forever
After following a delusional McCoy into 1930s Earth, Kirk must make a heart-wrenching choice to save the future.