Season 1
Episodes
S1 · E1 · 8 Sept 1973 · 24 min
Beyond the Farthest Star
Stardate: 5521.3 In orbit around a dead star, the Enterprise comes across a huge starship inhabited by a parasitic life form that threatens the entire ship.
S1 · E2 · 15 Sept 1973 · 24 min
Yesteryear
Stardate: 5373.4 Spock travels back in time to prevent his death as a young Vulcan.
S1 · E3 · 22 Sept 1973 · 24 min
One of Our Planets Is Missing
Stardate: 5371.3 The crew of the Enterprise races to find a way to stop a cloud from destroying inhabited planets.
S1 · E4 · 29 Sept 1973 · 24 min
The Lorelei Signal
Stardate: 5483.7 Female crew members must take over the Enterprise when the men are incapacitated by a race of sirens.
S1 · E5 · 6 Oct 1973 · 24 min
More Tribbles, More Troubles
Stardate: 5392.4 Cyrano Jones introduces tribbles that cannot reproduce.
S1 · E6 · 13 Oct 1973 · 24 min
The Survivor
Stardate: 5143.3 The Enterprise finds a long-lost explorer.
S1 · E7 · 20 Oct 1973 · 24 min
The Infinite Vulcan
Stardate: 5554.4 A race of plant people, and their master, have a plan to force peace onto the galaxy.
S1 · E8 · 27 Oct 1973 · 24 min
The Magicks of Megas-tu
Stardate: 1254.4 At the center of the galaxy, the Enterprise discovers a race of powerful aliens.
S1 · E9 · 3 Nov 1973 · 24 min
Once Upon a Planet
Stardate: 5591.2 Kirk returns to the "shore leave" planet, but it's not as peaceful as it was when they last saw it.
S1 · E10 · 10 Nov 1973 · 24 min
Mudd's Passion
Stardate: 4978.5 Space con artist Harry Mudd returns, selling a fake love potion.
S1 · E11 · 17 Nov 1973 · 24 min
The Terratin Incident
Stardate: 5577.3 The Enterprise crew begins to shrink after radiation exposure.
S1 · E12 · 24 Nov 1973 · 24 min
The Time Trap
Stardate: 5267.6 The Enterprise crew must work with Klingons to escape from a pocket universe.
S1 · E13 · 1 Dec 1973 · 24 min
The Ambergris Element
Stardate: 5499.9 While exploring the planet Argo, Kirk and Spock are turned into water breathers.
S1 · E14 · 15 Dec 1973 · 24 min
The Slaver Weapon
Stardate: 4187.3 Spock, Sulu, and Uhura discover a time capsule from an ancient and technologically advanced race. However, it draws some unwanted attention.
S1 · E15 · 5 Jan 1974 · 24 min
The Eye of the Beholder
Stardate: 5501.2 Telepathic aliens put Kirk, Spock and McCoy in a zoo.
S1 · E16 · 12 Jan 1974 · 24 min
The Jihad
Stardate: 5683.1 Kirk and Spock are recruited for a heist to recover a stolen relic, which if not recovered could spark an galactic jihad.
Data and images from TMDB.