Star Trek: The Original Series S01E15 Shore Leave
The crew takes a much-needed break on a planet that seems idyllic but soon manifests their thoughts and fantasies, some of which turn dang..
Star Trek: The Original Series S01E14 Balance of Terror
The Enterprise engages in a cat-and-mouse battle with a Romulan ship testing Earth’s defenses.
As tensions rise, themes of prejudice, duty,..
Star Trek: The Original Series S01E13 The Conscience of the King
Captain Kirk suspects that a Shakespearean actor is actually Kodos the Executioner, a notorious mass murderer believed dead.
As he investig..
Star Trek: The Original Series S01E12 The Menagerie, Part II
As the court-martial continues, the transmitted footage reveals the full story of Captain Pike’s mission to Talos IV.
The crew must decide ..
Star Trek: The Original Series S01E11 The Menagerie, Part I
Spock hijacks the Enterprise to take his former captain, Christopher Pike, to the forbidden planet Talos IV.
Facing court-martial, Spock pr..
Star Trek: The Original Series S01E10 The Corbomite Maneuver
The Enterprise encounters a massive, mysterious vessel whose commander threatens to destroy the ship.
In a high-stakes battle of wits, Capt..
Star Trek: The Original Series S01E09 Dagger of the Mind
While visiting a penal colony, Captain Kirk encounters a doctor using a device that can alter minds, leading to dangerous consequences.
Kir..
Star Trek: The Original Series S01E08 Miri
The crew discovers a planet eerily similar to Earth, inhabited only by children who contract a deadly disease upon reaching puberty.
As the..
Star Trek: The Original Series S01E07 What Are Little Girls Made Of?
Captain Kirk and Nurse Chapel find Dr. Roger Korby, who has discovered a way to create android duplicates of humans.
As Korby’s plans unfol..
Star Trek: The Original Series S01E06 Mudd’s Women
The Enterprise rescues conman Harry Mudd and three mysteriously beautiful women he’s transporting.
Their presence causes tension among the ..
Star Trek: The Original Series S01E05 The Enemy Within
A transporter malfunction splits Captain Kirk into two versions of himself: one good but weak, the other evil and aggressive.
The crew must..
Star Trek: The Original Series S01E04 The Naked Time
A strange infection spreads among the crew, causing them to lose their inhibitions and behave irrationally.
As chaos ensues, the Enterprise..
Star Trek: The Original Series S01E03 Where No Man Has Gone Before
After passing through a mysterious energy barrier at the edge of the galaxy, two crew members develop god-like powers, threatening the saf..
Star Trek: The Original Series S01E02 Charlie X
The Enterprise takes aboard Charlie Evans, a young man who has spent years alone on a deserted planet and possesses extraordinary powers.
A..
Star Trek: The Original Series S01E29 Operation — Annihilate!
The Enterprise arrives at a colony suffering from a mass insanity caused by deadly parasitic creatures.
As the crew searches for a cure..
Star Trek: The Original Series S01E28 The City on the Edge of Forever
After an accidental overdose, Dr. McCoy jumps through a mysterious portal into the past, altering history and erasing the Enterprise from ..
Star Trek: The Original Series S01E27 The Alternative Factor
The Enterprise detects a cosmic disturbance linked to a man claiming to be battling his evil counterpart across dimensions.
Kirk must d..
Star Trek: The Original Series S01E26 Errand of Mercy
The Federation and Klingons prepare for war, but the inhabitants of a disputed planet refuse to choose sides.
As Kirk and Spock work to..
Star Trek: The Original Series S01E25 The Devil in the Dark
Miners on a remote planet are being killed by an unknown creature, forcing Kirk and Spock to confront a seemingly hostile alien lifeform.
..
Star Trek: The Original Series S01E24 This Side of Paradise
The Enterprise crew is exposed to spores that create an artificial sense of happiness, leading them to abandon their duties.
Spock, for..
Star Trek: The Original Series S01E23 A Taste of Armageddon
The Enterprise visits a planet engaged in a bizarre, computerized war where those declared “casualties” must report for execution.
Kirk..
Star Trek: The Original Series S01E22 Space Seed
The crew discovers a sleeper ship containing Khan Noonien Singh, a genetically engineered superhuman from Earth’s past.
As Khan’s true ..
Star Trek: The Original Series S01E21 The Return of the Archons
The Enterprise encounters a society controlled by an unseen force known as Landru, which demands absolute conformity.
Kirk and Spock mu..
Star Trek: The Original Series S01E20 Court Martial
Captain Kirk is accused of negligence leading to the death of a crewman, putting his command and reputation on the line.
As the trial u..
Star Trek: The Original Series S01E19 Tomorrow Is Yesterday
A time warp accidentally sends the Enterprise back to 20th-century Earth, where they must retrieve a captured Air Force pilot without alte..
Star Trek: The Original Series S01E18 Arena
Captain Kirk is forced into a one-on-one battle against the reptilian Gorn captain on an isolated planet, with only his ingenuity to survi..
Star Trek: The Original Series S01E17 The Squire of Gothos
The Enterprise is trapped by a powerful, mischievous being named Trelane, who treats the crew like playthings in his surreal, medieval wor..
Star Trek: The Original Series S01E16 The Galileo Seven
Spock and a small crew crash-land on a hostile planet while exploring a quasar-like phenomenon. As tensions rise, Spock’s logical approach..