Star Trek Episode Guide

Season 1

The Cage

S1 E0 ●
Captain Pike and his crew are lured to Talos IV by a race capable of creating powerful illusions.

The Man Trap

S1 E1 ● 1966-Sep-08
A shape-shifting, salt-craving creature terrorizes the crew of Enterprise.

Charlie X

S1 E2 ● 1966-Sep-15
17-year old Charlie Evans, the lone survivor of a colony expedition that crashed on the planet Thasus 14 years ago, comes aboard the U.S.S. Enterprise from the science vessel S.S. Antares

Where No Man Has Gone Before

S1 E3 ● 1966-Sep-22
The Enterprise encounters a record-marker left behind by the S.S. Valiant 200 years ago as it tried to go through an energy barrier at the rim of the galaxy. The Enterprise sets c...

The Naked Time

S1 E4 ● 1966-Sep-29
The Enterprise is sent to planet Psi 2000 to pick up a scientific team and to observe the dying planet in its final stages. A member of a landing party investigating the ruins on the collapsing...

The Enemy Within

S1 E5 ● 1966-Oct-06
While orbiting the planet Alpha 177, a transporter malfunction creates a duplicate of Kirk — one good and honorable, the other evil and aggressive. The Evil Kirk runs amok on his ship, committing vio...

Mudd's Women

S1 E6 ● 1966-Oct-13
The Enterprise rescues con artist Harry Mudd and his beautiful female cargo. In pursuit of Mudd's ship, the Enterprise has burned out its lithium crystals, which power the starship's eng...

What Are Little Girls Made Of?

S1 E7 ● 1966-Oct-20
The Enterprise travels to Exo III in search of exobiologist Dr. Korby, fiancé of Nurse Chapel. Using equipment left behind by "The Old Ones," the extinct natives of Exo III, Korby has construct...


S1 E8 ● 1966-Oct-27
The U.S.S. Enterprise answers an old distress signal to find an unnamed planet that is almost an exact duplicate of Earth in the 1960s. A landing party beams down and discovers that 300 years b...

Dagger of the Mind

S1 E9 ● 1966-Nov-03
Kirk and Dr. Helen Noel, the ship's psychiatrist, tour the Tantalus Penal Colony as the Enterprise delivers supplies. When Dr. Simon van Gelder of the psychiatric staff escapes to the U.S.S.

The Corbomite Maneuver

S1 E10 ● 1966-Nov-10
While exploring an uncharted region of space, the U.S.S. Enterprise comes upon an alien space buoy, warning ships away and blocking the starship's path. Kirk's orders the phasers to destroy the...

The Menagerie, Part I

S1 E11 ● 1966-Nov-17
The U.S.S. Enterprise and her crew are diverted by a signal from Christopher Pike, the former captain of the U.S.S. Enterprise, to Starbase 11. When they arrive, they find Captain Christ...

The Menagerie, Part II

S1 E12 ● 1966-Nov-24
During the proceedings, from an unknown source, they watch the events that transpired when Captain Pike was in command of the U.S.S. Enterprise. They are shown Pike's initial contact with the T...

The Conscience of the King

S1 E13 ● 1966-Dec-08
Kirk is contacted by Dr. Leighton, a friend from the Tarsus IV colony years ago, who believes that Kodos the Executioner — the militant dictator who executed half of the people on the colony — is at...

Balance of Terror

S1 E14 ● 1966-Dec-15
Responding to distress calls from border outposts along the Neutral Zone between the Federation and the Romulan Star Empire, Kirk and the crew receives a final message from a Federation station report...

Shore Leave

S1 E15 ● 1966-Dec-29
A U.S.S. Enterprise landing party beams down to an uncharted planet. The planet seems like a perfect candidate for shore leave with its "Earth-type" characteristics. McCoy's first encounter on ...

The Galileo Seven

S1 E16 ● 1967-Jan-05
On its way to deliver medical supplies to plague-ridden Makus III, the U.S.S. Enterprise passes Murasaki 312. Since they are under Starfleet orders to inspect galactic phenomena such as this qu...

The Squire of Gothos

S1 E17 ● 1967-Jan-12
The U.S.S. Enterprise must cross an empty sector of space on their way to deliver supplies to colony Beta VI. In this space, they find an uncharted planet whose presence can't be explained. Aft...


S1 E18 ● 1967-Jan-19
The U.S.S. Enterprise is in pursuit of an unknown alien ship which has destroyed a Starfleet base on Cestus III. In an uncharted area of space, both the alien ship and the Enterprise are...

Tomorrow is Yesterday

S1 E19 ● 1967-Jan-26
When the U.S.S. Enterprise is thrown into a time warp by a black star, it ends up orbiting Earth in the 20th century. A jet is dispatched to bring the "UFO" down and the plane is accidentally d...

Court Martial

S1 E20 ● 1967-Feb-02
When the U.S.S. Enterprise puts in at Starbase 11 for repairs caused in an ion storm, Kirk gives his report of the circumstances of Lieutenant Commander Ben Finney's death to Commodore Stone. A...

The Return of the Archons

S1 E21 ● 1967-Feb-09
The U.S.S. Enterprise is investigating Beta III, where the U.S.S. Archon disappeared over 100 years before. When the landing party exhibits strange behavior, Kirk sends another party dow...

Space Seed

S1 E22 ● 1967-Feb-16
The Enterprise discovers the S.S. Botany Bay, an old-style, pre-warp sleeper ship from Earth that contains several bodies in stasis. Amongst these bodies is Khan Noonien Singh, a genetic...

A Taste of Armageddon

S1 E23 ● 1967-Feb-23
The U.S.S. Enterprise is ordered to pick up Ambassador Robert Fox, who is headed to planet Eminiar VII on a diplomatic mission. Upon arriving at the planet, the ship is warned away because Emin...

This Side of Paradise

S1 E24 ● 1967-Mar-02
The Enterprise arrives at Omicron Ceti III, hoping to find surviving colonists who have been exposed to deadly berthold rays for three years, and the crew is surprised to find the colony alive ...

The Devil in the Dark

S1 E25 ● 1967-Mar-09
The U.S.S. Enterprise arrives to investigate reports of an unknown monster deep in the mining tunnels of Janus VI. The being is apparently destroying machinery and killing the miners, and has t...

Errand of Mercy

S1 E26 ● 1967-Mar-23
While negotiations quickly break down between the Federation and the Klingon Empire, the Enterprise is sent to Organia, a planet of primitive people strategically located between the two sides....

The Alternative Factor

S1 E27 ● 1967-Mar-30
Starfleet is baffled by a phenomenon and is suspicious that it's a "rip in the universe." It sends the Enterprise to check it out and what at first is thought to be a sign of attack is no less ...

The City on the Edge of Forever

S1 E28 ● 1967-Apr-06
While treating Sulu on the bridge, McCoy accidentally injects himself with an overdose of cordrazine. In his cordrazine induced frenzy, McCoy exits the bridge and manages to beam himself down to the p...

Operation: Annihilate!

S1 E29 ● 1967-Apr-13
Arriving at the planet Deneva, home of Kirk's only brother Sam and his family, the U.S.S. Enterprise picks up a transmission from a Denevan pilot who has steered his craft into the sun to destr...