Seasons & episodes
S1 · E11The Menagerie (1) 1966-11-17 · 49 min
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.
S1 · E12The Menagerie (2) 1966-11-24 · 50 min
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.
S1 · E13The Conscience of the King 1966-12-08 · 50 min
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.
S1 · E14Balance of Terror 1966-12-15 · 50 min
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.
S1 · E15Shore Leave 1966-12-29 · 50 min
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.
S1 · E16The Galileo Seven 1967-01-05 · 50 min
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.
S1 · E17The Squire of Gothos 1967-01-12 · 50 min
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.
S1 · E18Arena 1967-01-19 · 51 min
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.
S1 · E19Tomorrow Is Yesterday 1967-01-26 · 50 min
In a freak accident the Enterprise is sent back to 20th century Earth, and must find their way back without changing history.
S1 · E20Court Martial 1967-02-02 · 50 min
Captain Kirk's career is at stake when he is put on trial for the loss of a crewman during an ion storm.
S1 · E21The Return of the Archons 1967-02-09 · 50 min
The Enterprise encounters a seemingly peaceful civilization run by a "benevolent" being named Landru... who intends for them to join his people.
S1 · E22Space Seed 1967-02-16 · 50 min
The Enterprise picks up a crew of genetic supermen from the 20th century... and their leader, Khan, plans to create a new empire.
S1 · E23A Taste of Armageddon 1967-02-23 · 50 min
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.
S1 · E24This Side of Paradise 1967-03-02 · 50 min
The Enterprise crew try to rescue colonists from deadly radiation, but instead encounter strange alien spores that seem to offer paradise.
S1 · E25The Devil in the Dark 1967-03-09 · 50 min
Kirk investigates a series of grisly murders on a mining planet that are the work of a seemingly hostile alien creature.
S1 · E26Errand of Mercy 1967-03-23 · 50 min
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.
S1 · E27The Alternative Factor 1967-03-30 · 51 min
Kirk and Spock encounter an alien named Lazarus who claims to be from an anti-matter universe.
S1 · E28The City on the Edge of Forever 1967-04-06 · 50 min
Kirk and Spock must travel into the past in order to correct a change that will alter history.
S1 · E29Operation: Annihilate! 1967-04-13 · 50 min
Kirk and the Enterprise must combat parasitic aliens threatening the lives of millions.
S2 · E1Amok Time 1967-09-15 · 50 min
First Officer Spock returns to his home world for a brutal Vulcan mating ritual.
S2 · E2Who Mourns for Adonais? 1967-09-22 · 51 min
The crew of the Enterprise are held captive by an alien who turns out to be the Greek god Apollo.
S2 · E3The Changeling 1967-09-29 · 50 min
The crew of the USS Enterprise deals with an indestructible planet-destroying space probe.
S2 · E4Mirror, Mirror 1967-10-06 · 50 min
A transporter mishap swaps Captain Kirk and his companions with their evil counterparts in a parallel universe. In the so-called Mirror Universe, the Enterprise is a ship of the Terran Empire, an organization as evil as the United Federation of Planets is benevolent.
S2 · E5The Apple 1967-10-13 · 50 min
The crew of the Enterprise visits a mysterious paradisical planet controlled by a computer that is served by the local inhabitants.