Season One Episode Guide

The Cage

Episode #: 100
Air Date: 10.04.88
Our Rating:

Christopher Pike and the U.S.S. Enterprise investigate a crash site on Talos IV, where the captain is imprisoned by powerful telepathic aliens and studied.

The Man Trap

Episode #: 101
Air Date: 09.08.66
Our Rating:

Captain Kirk and the Enterprise deliver supplies to planet M-113, where McCoy is reunited with an old flame. A salt-sucking shapeshifter begins attacking the crew.

Charlie X

Air Date: 09.15.66
Our Rating:

The Enterprise brings aboard a young, undisciplined man with unimaginable powers -- which he uses against the crew to get what he wants.

Where No Man Has Gone Before

Episode #: 103
Air Date: 09.22.66
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One of the Enterprise's own crew threatens the ship when an alien energy force gives him god-like powers. Kirk must sacrifice his friend for the good of the galaxy -- if he can.

The Naked Time

Episode #: 104
Air Date: 09.29.66

The Enterprise crew is infected by an alien virus, which accentuates their wildest emotions and desires.

The Enemy Within

Episode #: 105
Air Date: 10.06.66
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A transporter accident separates Kirk into two people -- a kind and gentle Kirk, and a strong and unscrupulous Kirk. The crew must reunite the two and restore their captain.

Mudd's Women

Episode #: 106
Air Date: 10.13.66

The Enterprise welcomes a freighter captain and three beautiful women, who turn the heads of every man on board -- but who are using a powerful drug to maintain their appearances.

What Are Little Girls Made Of?

Episode #: 107
Air Date: 10.20.66
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Nurse Chapel is reunited with her long-lost fiancée, who has created a colony of android clones and plans to take over the Enterprise -- and the Federation.


Episode #: 108
Air Date: 10.27.66
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The Enterprise finds a world ravaged by disease, where the only survivors are a group of children -- who themselves suffer and die upon reaching adulthood.

Dagger of the Mind

Episode #: 109
Air Date: 11.03.66
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Kirk and the Enterprise crew investigate a penal colony, where the facility's reputable director gives the captain a first-hand look at his neural neutralizer device.

The Corbomite Maneuver

Episode #: 110
Air Date: 11.10.66
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When the Enterprise is caught in a deadly conflict with an unknown alien vessel, Kirk must use all his wits to escape.

The Menagerie, Part 1

Episode #: 111
Air Date: 11.17.66
Our Rating:

Spock kidnaps his former captain and commandeers the Enterprise, prompting a court martial where he presents the story of Christopher Pike's fateful mission to the planet Talos IV.

The Menagerie, Part 2

Episode #: 112
Air Date: 11.24.66
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The fate of Spock and Christopher Pike hang in the balance as Kirk and Commodore Mendez watch the story of Pike's alien incarceration years before.

The Conscience of the King

Episode #: 113
Air Date: 12.08.66
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Captain Kirk grows suspicious that a respected actor from a visiting theatrical troupe was once a notorious mass-murderer.

Balance of Terror

Episode #: 114
Air Date: 12.15.66
Our Rating:

Kirk and crew battle an invisible enemy -- a Romulan warbird that has crossed the Neutral Zone and attacked Federation outposts. Spock's loyalties are questioned when the first Romulan visual transmission is intercepted.

Shore Leave

Episode #: 115
Air Date: 12.29.66
Our Rating:

The crew find an idyllic world where their wildest dreams -- and darkest nightmares -- come true.

The Galileo Seven

Episode #: 116
Air Date: 01.05.67

Spock, McCoy, Scott and four crewmen crash land on a hostile alien planet, and Kirk must choose between looking for them or delivering desperately-needed medical supplies to a plague-stricken world.

The Squire of Gothos

Episode #: 117
Air Date: 01.12.67

The Enterprise crew is captured by an impetuous and eccentric being with tremendous powers, and Kirk must challenge him to a duel if they hope to escape.


Episode #: 118
Air Date: 01.19.67
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Powerful aliens transport Kirk to a barren planet, forcing him to fight to the death with an unstoppable Gorn enemy.

Tomorrow Is Yesterday

Episode #: 119
Air Date: 01.26.67
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The Enterprise is thrown back into the past, where Kirk and his crew must prevent a military sighting of the ship from changing Earth's history.

Court Martial

Episode #: 120
Air Date: 02.02.67
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Captain Kirk is accused of violating procedure and blamed for the death of an officer and friend, leading to his court martial.

The Return of the Archons

Episode #: 121
Air Date: 02.09.67
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The Enterprise investigates a world where a Federation starship disappeared more than a century before, and find a civilization controlled by a group of "law givers" and the enigmatic Landru.

Space Seed

Episode #: 122
Air Date: 02.16.67
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The crew finds a sleeper ship from the 20th century, and revive a genetically-altered military leader who attempts to take over the ship: the cunning and powerful Khan.

A Taste of Armageddon

Episode #: 123
Air Date: 02.23.67
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Kirk acts to stop the slaughter of thousands of people when the crew finds a civilization fighting a virtual war with computers.

This Side of Paradise

Episode #: 124
Air Date: 03.02.67
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The crew attempt to evacuate a human colony, but spores from a local plant alter their minds, leading to an all-out mutiny. Spock explores his emotional side.

The Devil In the Dark

Episode #: 125
Air Date: 03.09.67
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An alien creature kills workers in a Federation mining colony, and the Enterprise crew must discover its shocking motives.

Errand of Mercy

Episode #: 126
Air Date: 03.23.67
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Kirk and Spock come face-to-face with the Klingon Empire during a mission to establish a Federation presence on the planet Organia, and find that the local people have no desire to defend themselves from the Klingons.

The Alternative Factor

Episode #: 127
Air Date: 03.30.67

The Enterprise finds the pilot of a space-time ship struggling with an evil version of himself from an alternate dimension -- and must stop the destruction of the entire universe.

The City On the Edge of Forever

Episode #: 128
Air Date: 04.06.67
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Dr. McCoy inadvertently changes history, wiping the Federation from existence. Kirk and Spock must follow him through a portal to Earth's 20th century to set things right.

Operation: Annihilate!

Episode #: 129
Air Date: 04.13.67
Our Rating:

An alien organism attacks Spock, and the only way to kill the parasite may be deadly to the Vulcan officer.