All Episodes of Star Trek
Browse all episodes of Star Trek
Season 1
7.2/106,195 votesLoading...The Man Trap
Season 1 Episode 1 - Aired 9/8/1966
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.
Director: Marc Daniels
Writer: George Clayton Johnson
7.0/105,776 votesLoading...Charlie X
Season 1 Episode 2 - Aired 9/15/1966
Charlie Evans, the sole survivor of a transport crash, is transferred to the Enterprise from a different ship. Why are they so eager to rid themselves of him, though? There's more to Charlie than meets the eye...
Director: Lawrence Dobkin
Writer: Gene Roddenberry, D.C. Fontana
7.7/106,720 votesLoading...Where No Man Has Gone Before
Season 1 Episode 3 - Aired 9/22/1966
While exploring the edge of the galaxy, the Enterprise encounters an energy barrier that gives some crewmen strange powers.
Director: James Goldstone
Writer: Samuel A. Peeples
7.8/105,458 votesLoading...The Naked Time
Season 1 Episode 4 - Aired 9/29/1966
A strange alien substance causes the crew to lose their inhibitions.
Director: Marc Daniels
Writer: John D. F. Black
7.6/105,174 votesLoading...The Enemy Within
Season 1 Episode 5 - Aired 10/6/1966
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.
Director: Leo Penn
Writer: Richard Matheson
6.7/105,039 votesLoading...Mudd's Women
Season 1 Episode 6 - Aired 10/13/1966
The Enterprise picks up a intergalactic conman, Harry Mudd, and three incredibly beautiful women who harbor a dark secret.
Director: Harvey Hart
Writer: Gene Roddenberry, Stephen Kandel
7.5/104,882 votesLoading...What Are Little Girls Made Of?
Season 1 Episode 7 - Aired 10/20/1966
Nurse Christine Chapel is reunited with her old fiance on Exo III, but the scientist has plans for Captain Kirk and the Federation.
Director: James Goldstone
Writer: Robert Bloch
6.9/104,708 votesLoading...Miri
Season 1 Episode 8 - Aired 10/27/1966
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.
Director: Vincent McEveety
Writer: Adrian Spies
7.4/104,577 votesLoading...Dagger of the Mind
Season 1 Episode 9 - Aired 11/3/1966
Kirk investigates an experimental facility for holding prisoners and finds a sinister scheme.
Director: Vincent McEveety
Writer: Shimon Wincelberg
8.0/105,142 votesLoading...The Corbomite Maneuver
Season 1 Episode 10 - Aired 11/10/1966
The Enterprise encounters a vast alien ship that threatens the Enterprise with destruction.
Director: Joseph Sargent
Writer: Jerry Sohl
8.2/105,104 votesLoading...The Menagerie (1)
Season 1 Episode 11 - Aired 11/17/1966
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.
Director: Marc Daniels, Robert Butler
Writer: Gene Roddenberry
8.1/104,893 votesLoading...The Menagerie (2)
Season 1 Episode 12 - Aired 11/24/1966
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.
Director: Marc Daniels, Robert Butler
Writer: Gene Roddenberry
7.1/104,438 votesLoading...The Conscience of the King
Season 1 Episode 13 - Aired 12/8/1966
Kirk is one of the last survivors who can identify a mass killer, who lurks among a Shakespearean troupe aboard the Enterprise.
Director: Gerd Oswald
Writer: Barry Trivers
8.8/105,980 votesLoading...Balance of Terror
Season 1 Episode 14 - Aired 12/15/1966
Kirk pits the Enterprise against an invisible spaceship testing the Federation's defenses.
Director: Vincent McEveety
Writer: Paul Schneider
7.4/104,663 votesLoading...Shore Leave
Season 1 Episode 15 - Aired 12/29/1966
The Enterprise crew take shore leave on a peaceful, pastoral planet... where their dreams and fantasies come to life.
Director: Robert Sparr
Writer: Theodore Sturgeon
7.6/104,472 votesLoading...The Galileo Seven
Season 1 Episode 16 - Aired 1/5/1967
Spock commands a stranded away team when their shuttlecraft is stranded on a planet with hostile natives.
Director: Robert Gist
Writer: Shimon Wincelberg, Oliver Crawford
7.2/104,375 votesLoading...The Squire of Gothos
Season 1 Episode 17 - Aired 1/12/1967
The Enterprise finds itself at the mercy of a seemingly omnipotent being who fancies himself an 18th century Englishman.
Director: Donnie McDougall
Writer: Paul Schneider
7.9/104,748 votesLoading...Arena
Season 1 Episode 18 - Aired 1/19/1967
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.
Director: Joseph Pevney
Writer: Fredric Brown, Gene L. Coon
7.9/104,531 votesLoading...Tomorrow Is Yesterday
Season 1 Episode 19 - Aired 1/26/1967
In a freak accident the Enterprise is sent back to 20th century Earth, and must find their way back without changing history.
Director: Michael O'Herlihy
Writer: D.C. Fontana
7.4/104,190 votesLoading...Court Martial
Season 1 Episode 20 - Aired 2/2/1967
Captain Kirk's career is at stake when he is put on trial for the loss of a crewman during an ion storm.
Director: Marc Daniels
Writer: Don Mankiewicz, Steven W. Carabatsos
7.1/104,073 votesLoading...The Return of the Archons
Season 1 Episode 21 - Aired 2/9/1967
The Enterprise encounters a seemingly peaceful civilization run by a "benevolent" being named Landru... who intends for them to join his people.
Director: Joseph Pevney
Writer: Gene Roddenberry, Boris Sobelman
8.7/105,671 votesLoading...Space Seed
Season 1 Episode 22 - Aired 2/16/1967
The Enterprise picks up a crew of genetic supermen from the 20th century... and their leader, Khan, plans to create a new empire.
Director: Marc Daniels
Writer: Gene L. Coon, Carey Wilber
8.0/104,405 votesLoading...A Taste of Armageddon
Season 1 Episode 23 - Aired 2/23/1967
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.
Director: Joseph Pevney
Writer: Gene L. Coon, Robert Hamner
7.8/104,279 votesLoading...This Side of Paradise
Season 1 Episode 24 - Aired 3/2/1967
The Enterprise crew try to rescue colonists from deadly radiation, but instead encounter strange alien spores that seem to offer paradise.
Director: Ralph Senensky
Writer: D.C. Fontana, Jerry Sohl
8.3/104,535 votesLoading...The Devil in the Dark
Season 1 Episode 25 - Aired 3/9/1967
Kirk investigates a series of grisly murders on a mining planet that are the work of a seemingly hostile alien creature.
Director: Joseph Pevney
Writer: Gene L. Coon
8.1/104,270 votesLoading...Errand of Mercy
Season 1 Episode 26 - Aired 3/23/1967
The Federation and the Klingon Empire teeter on the brink of war as Kirk investigates Organia, a humble planet, inhabited by pacifists, that is unwittingly caught in the middle.
Director: John Newland
Writer: Gene L. Coon
5.7/104,068 votesLoading...The Alternative Factor
Season 1 Episode 27 - Aired 3/30/1967
Kirk and Spock encounter an alien named Lazarus who claims to be from an anti-matter universe.
Director: Gerd Oswald
Writer: Don Ingalls
9.2/106,901 votesLoading...The City on the Edge of Forever
Season 1 Episode 28 - Aired 4/6/1967
Kirk and Spock must travel into the past in order to correct a change that will alter history.
Director: Joseph Pevney
Writer: D.C. Fontana, Harlan Ellison
7.5/103,879 votesLoading...Operation: Annihilate!
Season 1 Episode 29 - Aired 4/13/1967
Kirk and the Enterprise must combat parasitic aliens threatening the lives of millions.
Director: Herschel Daugherty
Writer: Steven W. Carabatsos