Season 1

Episode Guide

The Cage

S1 E1
Sep 8, 1966
When the Enterprise answers a distress call, Capt. Pike (Jeffrey Hunter) encounters manipulative aliens. Original series pilot. TVPG

The Man Trap

S1 E2
Sep 8, 1966
A shape-shifting, salt-craving creature terrorizes the crew of Enterprise

Charlie "X"

S1 E3
Sep 15, 1966
A powerful teenage boy wreaks havoc aboard the Enterprise

Where No Man Has Gone Before

S1 E4
Sep 22, 1966
While exploring the energy barrier at galaxy's edge that crippled an earlier ship, Kirk's long-time friend and crewmate Gary Mitchell begins mutating into a god-like entity disdainful of the "mortals" around him.

The Naked Time

S1 E5
Sep 29, 1966
The Enterprise crew catch a virus that removes their inhibitions

The Enemy Within

S1 E6
Oct 6, 1966
A transporter malfunction creates an evil Kirk

Mudd's Women

S1 E7
Oct 13, 1966
The Enterprise rescues con artist Harry Mudd and his "beautiful" female cargo

What are Little Girls Made Of

S1 E8
Oct 20, 1966
Nurse Chapel's long-lost fiance is found - along with his androids.


S1 E9
Oct 27, 1966
A strange group of children are discovered on an Earth-like planet.

Dagger of the Mind

S1 E10
Nov 3, 1966
A new treatment for the criminally insane has deadly results

The Corbomite Maneuver

S1 E11
Nov 10, 1966
While exploring an uncharted area of space, the Enterprise is outmatched and taken in tow by a massive spherical spaceship

The Menagerie, Part I

S1 E12
Nov 17, 1966
Spock hijacks the Enterprise to return an injured Captain Pike to Talos IV

The Menagerie, Part II

S1 E13
Nov 24, 1966
The Talosians force Kirk to view Captain Pike's original mission to their world

The Conscience of the King

S1 E14
Dec 8, 1966
Kirk suspects Shakespearean actor Anton Karidian as a mass murderer.

Balance of Terror

S1 E15
Dec 15, 1966
After attacking an outpost, Romulans battle the Enterprise

Shore Leave

S1 E16
Dec 29, 1966
While on shore leave, the crew's thoughts mysteriously come to life

The Galileo Seven

S1 E17
Jan 5, 1967
Seven Enterprise crew members go on a shuttle mission with Spock in command

The Squire of Gothos

S1 E18
Jan 12, 1967
A powerful entity known as Trelane torments the crew of the Enterprise.


S1 E19
Jan 19, 1967
Mysterious aliens pit Kirk against a Gorn in a barehanded duel.

Tomorrow Is Yesterday

S1 E20
Jan 26, 1967
A time accident leaves the Enterprise a UFO over 20th century Earth.

Court Martial

S1 E21
Feb 2, 1967
Kirk is recalled for a potential court-martial

The Return of the Archons

S1 E22
Feb 9, 1967
A world run by a computer named Landru traps the Enterprise crew.

Space Seed

S1 E23
Feb 16, 1967
Kirk meets Khan, a leader of Earth's Eugenics Wars of the 1990s.

A Taste of Armageddon

S1 E24
Feb 23, 1967
A computerized war fought by two planets ensnares the Enterprise.

This Side of Paradise

S1 E25
Mar 2, 1967
The Enterprise visits a colony where floral spores bring peaceful contentment.

The Devil in the Dark

S1 E26
Mar 9, 1967
An unknown monster threatens a critical mining operation.

Errand of Mercy

S1 E27
Mar 23, 1967
Kirk and Spock battle Klingons to free Organia.

The Alternative Factor

S1 E28
Mar 29, 1967
An alien being fights himself across two realities.

The City on the Edge of Forever

S1 E29
Apr 6, 1967
Kirk and Spock go back in time to save McCoy -- and their own universe.

Operation: Annihilate!

S1 E30
Apr 13, 1967
The Enterprise crew must rid planet Deneva -- and Spock -- of deadly parasites.