• Air date: 08 Sep '66 29 episodes
      The first season of the original Star Trek aired Thursdays at 8:30-9:30 pm on NBC from September 8, 1966 to April 13, 1967.
  • List of Episodes (29)
    • 1. The Man Trap

      08 Sep '66
      Kirk and his crew are at deadly risk from an alien creature that feeds on the salt in a human body and can take on any form.
    • 2. Charlie X

      15 Sep '66
      Captain Kirk must learn the limits to the power of a 17-year-old boy with the psychic ability to create anything and destroy anyone.
    • 3. Where No Man Has Gone Before

      22 Sep '66
      While exploring the edge of the galaxy, the Enterprise encounters an energy barrier that gives two crewmen godlike powers.
    • 4. The Naked Time

      29 Sep '66
      A strange alien substance causes the crew to act out their deepest inhibitions, while the ship plummets out of orbit.
    • 5. The Enemy Within

      06 Oct '66
      A transporter malfunction causes Captain Kirk to split into his "good" and "evil" selves, and a landing party will freeze to death if they don't merge the two back together.
    • 6. Mudd's Women

      13 Oct '66
      The Enterprise picks up a intergalactic conman, Harry Mudd, and three incredibly beautiful women who harbor a dark secret.
    • 7. What Are Little Girls Made Of?

      20 Oct '66
      Nurse Christine Chapel is reunited with her old fiance on Exo III, but the scientist has plans for Captain Kirk and the Federation.
    • 8. Miri

      27 Oct '66
      Kirk and a landing party are stranded on a planet due to a disease that causes any adult to die a painful death, and must deal with the local children who have survived.
    • 9. Dagger of the Mind

      03 Nov '66
      Kirk investigates an experimental facility for holding prisoners and finds a sinister scheme.
    • 10. The Corbomite Maneuver

      10 Nov '66
      The Enterprise encounters a vast alien ship that sets out to test them.
    • 11. The Menagerie (1)

      17 Nov '66
      Spock kidnaps his former captain, the crippled Christopher Pike, and heads for a quarantined planet, putting his career and Kirk's life on the line.
    • 12. The Menagerie (2)

      24 Nov '66
      Spock's court-martial continues as he attempts to justify his abduction of Pike, the theft of the Enterprise, and his heading for a planet declared forbidden by Starfleet.
    • 13. The Conscience of the King

      08 Dec '66
      Kirk is one of the last survivors who can identify a mass killer, who lurks among a Shakespearean troupe aboard the Enterprise.
    • 14. Balance of Terror

      15 Dec '66
      Kirk pits the Enterprise against an invisible spaceship testing the Federation's defenses.
    • 15. Shore Leave

      29 Dec '66
      The Enterprise crew take shore leave on a peaceful, pastoral planet...where their dreams and fantasies come to life.
    • 16. The Galileo Seven

      05 Jan '67
      Spock commands a stranded away team when their shuttlecraft is stranded on a planet with hostile natives.
    • 17. The Squire of Gothos

      12 Jan '67
      The Enterprise finds itself at the mercy of a seemingly omnipotent being who fancies himself a 18th century Englishman.
    • 18. Arena

      19 Jan '67
      When a mysterious alien race destroy an Earth colony, the Enterprise pursues but Kirk and the alien captain are forced to fight each other by powerful aliens.
    • 19. Tomorrow Is Yesterday

      26 Jan '67
      The Enterprise collides with a black hole and is thrown back to Earth in the 20th century, where they must find a way back and erase any trace of their presence. Matters become complicated when they rescue an Air Force pilot and cannot return him without changing history...but if he disappears that will change history as well.
    • 20. Court Martial

      02 Feb '67
      Captain Kirk's career is at stake when he is put on trial for the loss of a crewman during an ion storm.
    • 21. The Return of the Archons

      09 Feb '67
      The Enterprise encounters a seemingly peaceful civilization run by a ""benevolent"" being named Landru...who intends for them to join his people.
    • 22. Space Seed

      16 Feb '67
      The Enterprise picks up a crew of genetic supermen from the 20th century...and their leader, Khan, plans to create a new empire.
    • 23. A Taste of Armageddon

      22 Feb '67
      The Enterprise arrives at a planet to establish diplomatic relations and finds itself in the middle of a "peaceful" war that threatens to destroy the ship.
    • 24. This Side of Paradise

      02 Mar '67
      The Enterprise crew is trapped in paradise when they come to rescue colonists who have fallen to pacifying alien spores and become infected themselves.
    • 25. The Devil in the Dark

      09 Mar '67
      Kirk investigates a series of grisly murders on a mining planet that are the work of a seemingly hostile alien creature.