Star Trek: Season 1 - 16 Episode s
1x1 - Beyond the Farthest Star
September 8, 1973
In orbit around a dead star, the Enterprise comes across a huge starship inhabited by a parasitic life form that threatens the entire ship.
1x2 - Yesteryear
September 15, 1973
Spock travels back in time to prevent his death as a young Vulcan.
1x3 - One of Our Planets Is Missing
September 22, 1973
The crew of the Enterprise races to find a way to stop a cloud from destroying inhabited planets.
1x4 - The Lorelei Signal
September 29, 1973
Female crew members must take over the Enterprise when the men are incapacitated by a race of sirens.
1x5 - More Tribbles, More Troubles
October 6, 1973
Cyrano Jones introduces tribbles that cannot reproduce.
1x6 - The Survivor
October 13, 1973
The Enterprise finds a long-lost explorer.
1x7 - The Infinite Vulcan
October 20, 1973
A race of plant people, and their master, have a plan to force peace onto the galaxy.
1x8 - The Magicks of Megas-tu
October 27, 1973
At the center of the galaxy, the Enterprise discovers a race of powerful aliens.
1x9 - Once Upon a Planet
November 3, 1973
Kirk returns to the "shore leave" planet, but it's not as peaceful as it was when they last saw it.
1x10 - Mudd's Passion
November 10, 1973
Space con artist Harry Mudd returns, selling a fake love potion.
1x11 - The Terratin Incident
November 17, 1973
The Enterprise crew begins to shrink after radiation exposure.
1x12 - The Time Trap
November 24, 1973
The Enterprise crew must work with Klingons to escape from a pocket universe.
1x13 - The Ambergris Element
December 1, 1973
While exploring the planet Argo, Kirk and Spock are turned into water breathers.
1x14 - The Slaver Weapon
December 15, 1973
Spock, Sulu, and Uhura discover a time capsule from an ancient and technologically advanced race. However, it draws some unwanted attention.
1x15 - The Eye of the Beholder
January 5, 1974
Telepathic aliens put Kirk, Spock and McCoy in a zoo.
1x16 - The Jihad
January 12, 1974
Kirk and Spock are recruited for a heist to recover a stolen relic, which if not recovered could spark an galactic jihad.