Space. The Final Frontier. The U.S.S. Enterprise embarks on a five year mission to explore the galaxy. The Enterprise is under the command of Captain James T. Kirk with First Officer Mr. Spock, from the planet Vulcan. With a determined crew, the Enterprise encounters Klingons, Romulans, time paradoxes, tribbles and genetic supermen led by Khan Noonian Singh. Their mission is to explore strange new worlds, to seek new life and new civilizations, and to boldly go where no man has gone before.
The Man Trap (Episode 1) 7.0
Writer: George Clayton Johnson
Air date: 1966-09-08
Runtime: 50 min
Overview: 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.
Charlie X (Episode 2) 6.7
Writer: D.C. Fontana
Air date: 1966-09-15
Runtime: 51 min
Overview: 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.
Where No Man Has Gone Before (Episode 3) 7.1
Writer: Samuel A. Peeples
Air date: 1966-09-22
Runtime: 51 min
Overview: 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.
The Naked Time (Episode 4) 7.2
Writer: John D. F. Black
Air date: 1966-09-29
Runtime: 51 min
Overview: 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.
The Enemy Within (Episode 5) 7.2
Writer: Richard Matheson
Air date: 1966-10-06
Runtime: 50 min
Overview: 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.
Mudd's Women (Episode 6) 6.5
Writer: Gene Roddenberry
Air date: 1966-10-13
Runtime: 50 min
Overview: 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.
What Are Little Girls Made Of? (Episode 7) 7.2
Writer: Robert Bloch
Air date: 1966-10-20
Runtime: 50 min
Overview: 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.
Miri (Episode 8) 6.9
Writer: Adrian Spies
Air date: 1966-10-27
Runtime: 50 min
Overview: 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.
Dagger of the Mind (Episode 9) 6.9
Writer: Shimon Wincelberg
Air date: 1966-11-03
Runtime: 50 min
Overview: 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.
The Corbomite Maneuver (Episode 10) 7.5
Writer: Jerry Sohl
Air date: 1966-11-10
Runtime: 50 min
Overview: 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.
The Menagerie (1) (Episode 11) 7.7
Writer: Gene Roddenberry
Air date: 1966-11-17
Runtime: 49 min
Overview: 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.
The Menagerie (2) (Episode 12) 7.8
Writer: Gene Roddenberry
Air date: 1966-11-24
Runtime: 50 min
Overview: 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.
The Conscience of the King (Episode 13) 6.7
Writer: Barry Trivers
Air date: 1966-12-08
Runtime: 50 min
Overview: 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.
Balance of Terror (Episode 14) 8.3
Writer: Paul Schneider
Air date: 1966-12-15
Runtime: 50 min
Overview: 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.
Shore Leave (Episode 15) 6.7
Writer: Theodore Sturgeon
Air date: 1966-12-29
Runtime: 50 min
Overview: 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.
The Galileo Seven (Episode 16) 7.3
Writer: Oliver Crawford
Air date: 1967-01-05
Runtime: 50 min
Overview: 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.
The Squire of Gothos (Episode 17) 7.0
Writer: Paul Schneider
Air date: 1967-01-12
Runtime: 50 min
Overview: 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.
Arena (Episode 18) 7.3
Writer: Gene L. Coon
Air date: 1967-01-19
Runtime: 51 min
Overview: 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.
Tomorrow Is Yesterday (Episode 19) 7.4
Writer: D.C. Fontana
Air date: 1967-01-26
Runtime: 50 min
Overview: In a freak accident the Enterprise is sent back to 20th century Earth, and must find their way back without changing history.
Court Martial (Episode 20) 7.3
Writer: Don Mankiewicz
Air date: 1967-02-02
Runtime: 50 min
Overview: Captain Kirk's career is at stake when he is put on trial for the loss of a crewman during an ion storm.
The Return of the Archons (Episode 21) 7.2
Writer: Gene Roddenberry
Air date: 1967-02-09
Runtime: 50 min
Overview: The Enterprise encounters a seemingly peaceful civilization run by a "benevolent" being named Landru... who intends for them to join his people.
Space Seed (Episode 22) 8.4
Writer: Gene L. Coon
Air date: 1967-02-16
Runtime: 50 min
Overview: The Enterprise picks up a crew of genetic supermen from the 20th century... and their leader, Khan, plans to create a new empire.
A Taste of Armageddon (Episode 23) 7.9
Writer: Gene L. Coon
Air date: 1967-02-23
Runtime: 50 min
Overview: 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.
This Side of Paradise (Episode 24) 7.7
Writer: D.C. Fontana
Air date: 1967-03-02
Runtime: 50 min
Overview: The Enterprise crew try to rescue colonists from deadly radiation, but instead encounter strange alien spores that seem to offer paradise.
The Devil in the Dark (Episode 25) 7.9
Writer: Gene L. Coon
Air date: 1967-03-09
Runtime: 50 min
Overview: Kirk investigates a series of grisly murders on a mining planet that are the work of a seemingly hostile alien creature.
Errand of Mercy (Episode 26) 8.0
Writer: Gene L. Coon
Air date: 1967-03-23
Runtime: 50 min
Overview: 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.
The Alternative Factor (Episode 27) 5.6
Writer: Don Ingalls
Air date: 1967-03-30
Runtime: 51 min
Overview: Kirk and Spock encounter an alien named Lazarus who claims to be from an anti-matter universe.
The City on the Edge of Forever (Episode 28) 8.6
Writer: D.C. Fontana
Air date: 1967-04-06
Runtime: 50 min
Overview: Kirk and Spock must travel into the past in order to correct a change that will alter history.
Operation: Annihilate! (Episode 29) 7.1
Writer: Steven W. Carabatsos
Air date: 1967-04-13
Runtime: 50 min
Overview: Kirk and the Enterprise must combat parasitic aliens threatening the lives of millions.
