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The Worst Episodes of Star Trek

Every episode of Star Trek ranked from worst to best. Explore the Worst Episodes of Star Trek!

The animated adventures of Captain Kirk, Mr. Spock and the crew of the Starship Enterprise.
Genres:AnimationDramaSci-Fi & Fantasy
Network:NBC

Worst Episodes Summary

"The Magicks of Megas-tu" is the worst rated episode of "Star Trek". It scored 5.9/10 based on 868 votes. Directed by Hal Sutherland and written by Larry Brody, it aired on 10/27/1973. This episode scored 0.2 points lower than the second lowest rated, "The Infinite Vulcan".

  • The Magicks of Megas-tu
    5.9/10868 votes
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    #1 - The Magicks of Megas-tu

    Season 1 Episode 8 - Aired 10/27/1973

    At the center of the galaxy, the Enterprise discovers a race of powerful aliens.

    Director: Hal Sutherland

    Writer: Larry Brody

  • The Infinite Vulcan
    6.1/10858 votes
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    #2 - The Infinite Vulcan

    Season 1 Episode 7 - Aired 10/20/1973

    A race of plant people, and their master, have a plan to force peace onto the galaxy.

    Director: Hal Sutherland

    Writer: Walter Koenig

  • Bem
    6.1/10751 votes
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    #3 - Bem

    Season 2 Episode 2 - Aired 9/14/1974

    The Enterprise crew is joined by a unpredictable alien called Ari bn Bem, an independent observer from the planet Pandro.

    Director: Bill Reed

    Writer: David Gerrold

  • Once Upon a Planet
    6.2/10804 votes
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    #4 - Once Upon a Planet

    Season 1 Episode 9 - Aired 11/3/1973

    Kirk returns to the "shore leave" planet, but it's not as peaceful as it was when they last saw it.

    Director: Hal Sutherland

    Writer: Chuck Menville

  • The Jihad
    6.2/10764 votes
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    #5 - The Jihad

    Season 1 Episode 16 - Aired 1/12/1974

    Kirk and Spock are recruited for a heist to recover a stolen relic, which if not recovered could spark an galactic jihad.

    Director: Hal Sutherland

    Writer: Stephen Kandel

  • Mudd's Passion
    6.3/10812 votes
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    #6 - Mudd's Passion

    Season 1 Episode 10 - Aired 11/10/1973

    Space con artist Harry Mudd returns, selling a fake love potion.

    Director: Hal Sutherland

    Writer: Stephen Kandel

  • The Ambergris Element
    6.4/10766 votes
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    #7 - The Ambergris Element

    Season 1 Episode 13 - Aired 12/1/1973

    While exploring the planet Argo, Kirk and Spock are turned into water breathers.

    Director: Hal Sutherland

    Writer: Margaret Armen

  • The Practical Joker
    6.4/10758 votes
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    #8 - The Practical Joker

    Season 2 Episode 3 - Aired 9/21/1974

    The computer of the Enterprise gains partial sentience and starts playing practical jokes on the crew.

    Director: Bill Reed

    Writer: Chuck Menville

  • How Sharper Than a Serpent's Tooth
    6.4/10720 votes
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    #9 - How Sharper Than a Serpent's Tooth

    Season 2 Episode 5 - Aired 10/5/1974

    The Enterprise runs into a being that once visited Earth and influenced the Mayan culture.

    Director: Bill Reed

    Writer: David Wise, Russell Bates

  • The Lorelei Signal
    6.5/10959 votes
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    #10 - The Lorelei Signal

    Season 1 Episode 4 - Aired 9/29/1973

    Female crew members must take over the Enterprise when the men are incapacitated by a race of sirens.

    Director: Hal Sutherland

    Writer: Margaret Armen

  • The Pirates of Orion
    6.5/10754 votes
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    #11 - The Pirates of Orion

    Season 2 Episode 1 - Aired 9/7/1974

    With Spock stricken down by a fatal disease, the Enterprise must track down the drug that can cure him before it is too late.

    Director: Bill Reed

    Writer: Howard Weinstein

  • Beyond the Farthest Star
    6.6/101,155 votes
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    #12 - Beyond the Farthest Star

    Season 1 Episode 1 - Aired 9/8/1973

    In orbit around a dead star, the Enterprise comes across a huge starship inhabited by a parasitic life form that threatens the entire ship.

    Director: Hal Sutherland

    Writer: Samuel A. Peeples

  • The Terratin Incident
    6.6/10785 votes
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    #13 - The Terratin Incident

    Season 1 Episode 11 - Aired 11/17/1973

    The Enterprise crew begins to shrink after radiation exposure.

    Director: Hal Sutherland

    Writer: Paul Schneider

  • One of Our Planets Is Missing
    6.7/10961 votes
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    #14 - One of Our Planets Is Missing

    Season 1 Episode 3 - Aired 9/22/1973

    The crew of the Enterprise races to find a way to stop a cloud from destroying inhabited planets.

    Director: Hal Sutherland

    Writer: Marc Daniels

  • The Eye of the Beholder
    6.7/10755 votes
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    #15 - The Eye of the Beholder

    Season 1 Episode 15 - Aired 1/5/1974

    Telepathic aliens put Kirk, Spock and McCoy in a zoo.

    Director: Hal Sutherland

    Writer: David P. Harmon

  • The Survivor
    6.8/10880 votes
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    #16 - The Survivor

    Season 1 Episode 6 - Aired 10/13/1973

    The Enterprise finds a long-lost explorer.

    Director: Hal Sutherland

    Writer: James Schmerer

  • Albatross
    6.8/10737 votes
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    #17 - Albatross

    Season 2 Episode 4 - Aired 9/28/1974

    Dr. McCoy is arrested and held responsible for causing a plague that ravaged the planet Dramia II, where he performed a mass-innoculation 19 years earlier.

    Director: Bill Reed

    Writer: Dario Finelli

  • The Time Trap
    6.9/10796 votes
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    #18 - The Time Trap

    Season 1 Episode 12 - Aired 11/24/1973

    The Enterprise crew must work with Klingons to escape from a pocket universe.

    Director: Hal Sutherland

    Writer: Joyce Perry

  • More Tribbles, More Troubles
    7.0/10979 votes
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    #19 - More Tribbles, More Troubles

    Season 1 Episode 5 - Aired 10/6/1973

    Cyrano Jones introduces tribbles that cannot reproduce.

    Director: Hal Sutherland

    Writer: David Gerrold

  • The Slaver Weapon
    7.0/10829 votes
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    #20 - The Slaver Weapon

    Season 1 Episode 14 - Aired 12/15/1973

    Spock, Sulu, and Uhura discover a time capsule from an ancient and technologically advanced race. However, it draws some unwanted attention.

    Director: Hal Sutherland

    Writer: Larry Niven

  • The Counter-Clock Incident
    7.0/10744 votes
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    #21 - The Counter-Clock Incident

    Season 2 Episode 6 - Aired 10/12/1974

    With Commodore Robert April (the first commander of the Enterprise) on board, Kirk pursues a ship plunging into a supernova, and enters a universe where time runs backwards.

    Director: Bill Reed

    Writer: Fred Bronson

  • Yesteryear
    8.1/101,200 votes
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    #22 - Yesteryear

    Season 1 Episode 2 - Aired 9/15/1973

    Spock travels back in time to prevent his death as a young Vulcan.

    Director: Hal Sutherland

    Writer: D.C. Fontana