All Episodes of Star Trek
Browse all episodes of Star Trek
Season 1
7.0/1077 votesThe Man Trap
Season 1 Episode 1 - Aired 9/8/1966
Doctor Leonard “Bones” McCoy meets a former girlfriend when the enterprise brings supplies to a remote archaeological survey group. Still attractive to McCoy, the woman's current appearance hides a dark and deadly secret.
Director: Marc Daniels
Writer: George Clayton Johnson
6.7/1064 votesCharlie X
Season 1 Episode 2 - Aired 9/15/1966
Raised from boyhood by non-corporeal beings, 17 year old Charles Evans is picked up and transferred to the Enterprise. On board the ship, the teenager proves dangerously unable to wield his enormous psionic powers with maturity.
Director: Lawrence Dobkin
Writer: D.C. Fontana, Gene Roddenberry
7.1/1060 votesWhere No Man Has Gone Before
Season 1 Episode 3 - Aired 9/22/1966
When Enterprise encounters a Force Field at the edge of the Galaxy, one of the crew members psionic abilities are accelerated to God like proportions causing him to become a powerful murderous being.
Director: James Goldstone
Writer: Samuel A. Peeples
7.2/1061 votesThe Naked Time
Season 1 Episode 4 - Aired 9/29/1966
An alien virus strips the enterprise crew of their inhibitions, causing chaos as each crew member is overcome by hidden emotions. Meanwhile, the Enterprise is being pulled inexorably into a nearby planet's gravity well.
Director: Marc Daniels
Writer: John D. F. Black
7.2/1058 votesThe Enemy Within
Season 1 Episode 5 - Aired 10/6/1966
Split by a transporter malfunction into two beings with very different personalities, the resulting twin Captain Kirk proves that neither a purely evil nor a sweetly good captain can survive without the missing half.
Director: Leo Penn
Writer: Richard Matheson
6.5/1053 votesMudd's Women
Season 1 Episode 6 - Aired 10/13/1966
Rescuing the crew of a ship from an asteroid belt, the Enterprise plays host to conman extraordinaire, the cunning Harry Mudd and his cargo: three beautiful women looking for suitors.
Director: Harvey Hart
Writer: Gene Roddenberry, Stephen Kandel
7.2/1053 votesWhat Are Little Girls Made Of?
Season 1 Episode 7 - Aired 10/20/1966
Helping nurse Christine Chapel search for her fiancé the enterprise finds a detached Dr. Kirby working on a plan to create Android duplicates of key figures, beginning with James Kirk.
Director: James Goldstone
Writer: Robert Bloch
6.9/1053 votesMiri
Season 1 Episode 8 - Aired 10/27/1966
On a planet populated by children whose aging process has been slowed artificially. Kirk’s landing party members contract a virus that kills adults. Despite their violent attacks, Kirk is determined to help the children.
Director: Vincent McEveety
Writer: Adrian Spies
6.9/1052 votesDagger of the Mind
Season 1 Episode 9 - Aired 11/3/1966
When a wild eyed maniac escaping from the Tantalus Penal Colony turns out to be one of the psychiatric staff, Kirk investigates the institution and discovers a chilling exercise in mind control.
Director: Vincent McEveety
Writer: Shimon Wincelberg
7.5/1058 votesThe Corbomite Maneuver
Season 1 Episode 10 - Aired 11/10/1966
Threatened by the sinister captain of a powerful alien vessel, Kirk claims that the Enterprise carries a powerful explosive which will destroy both ships. The move produces unexpected actions from the alien adversary.
Director: Joseph Sargent
Writer: Jerry Sohl
7.7/1047 votesThe Menagerie (1)
Season 1 Episode 11 - Aired 11/17/1966
Apparently summoned to Star Base 11, Kirk, Spock and McCoy visit a former Enterprise Commander, the paralyzed and horribly disfigured Christopher Pike. Uncharacteristically, Spock commandeers the Enterprise, then turns himself in for court martial.
Director: Marc Daniels, Robert Butler
Writer: Gene Roddenberry
7.8/1049 votesThe Menagerie (2)
Season 1 Episode 12 - Aired 11/24/1966
Spock's court martial reveals the actions of Captain Pike on his previous visit to Talos IV, where the powerful Talosians tried to persuade Pike to breed with women provided for the purpose.
Director: Marc Daniels, Robert Butler
Writer: Gene Roddenberry
6.7/1046 votesThe Conscience of the King
Season 1 Episode 13 - Aired 12/8/1966
Contacted by one of the other two witnesses to the crimes of mass murderer “Kodos the Executioner,” Kirk is persuaded that the criminal may be disguising himself as an actor in a traveling theatrical troupe.
Director: Gerd Oswald
Writer: Barry Trivers
8.3/1054 votesBalance of Terror
Season 1 Episode 14 - Aired 12/15/1966
Despite the earlier Romulan war, the Romulans have never been seen in person. The Enterprise, in pursuit of a Romulan aggressor, makes a discovery that causes suspicion about a senior crew member.
Director: Vincent McEveety
Writer: Paul Schneider
6.7/1047 votesShore Leave
Season 1 Episode 15 - Aired 12/29/1966
When McCoy sees the White Rabbit from Alice in Wonderland, the crew begins to realize that the planet they are visiting seems to have the dangerous power to turn any thought into reality.
Director: Robert Sparr
Writer: Theodore Sturgeon
7.3/1048 votesThe Galileo Seven
Season 1 Episode 16 - Aired 1/5/1967
Crash landing on a planet populated by hostile giants, the 7-man crew of the shuttlecraft Galileo find themselves unable to communicate with the enterprise or to escape the planet's atmosphere.
Director: Robert Gist
Writer: Oliver Crawford, Shimon Wincelberg
7.0/1050 votesThe Squire of Gothos
Season 1 Episode 17 - Aired 1/12/1967
Encountering an uncharted planet in an empty region of space, Kirk and his crew are entertained by Trelane, a playful being who lacks the self-control to wield his great psionic powers with discipline.
Director: Donnie McDougall
Writer: Paul Schneider
7.3/1050 votesArena
Season 1 Episode 18 - Aired 1/19/1967
With both their ships held captive by powerful beings, Kirk and the captain of the alien vessel are placed on an asteroid to fight for their lives and the lives of their crews.
Director: Joseph Pevney
Writer: Gene L. Coon, Fredric Brown
7.4/1047 votesTomorrow 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
7.3/1043 votesCourt 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
7.2/1043 votesThe 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
8.4/1053 votesSpace 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
7.9/1044 votesA 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
7.7/1046 votesThis 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
7.9/1049 votesThe 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
8.0/1047 votesErrand 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
5.6/1042 votesThe 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
8.6/1060 votesThe 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
7.1/1039 votesOperation: 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