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Episode 24
Turnabout Intruder (50:42)
A woman from Kirk's past exchanges bodies with him and takes control of the ship
Aired: 06/03/1969
Episode 23
All Our Yesterdays (50:28)
Kirk, Spock and McCoy enter a time portal and get stuck in the past on a planet about to be consumed by a nova
Aired: 03/14/1969
Episode 22
The Savage Curtain (50:43)
Kirk and Spock are forced into a battle of good and evil
Aired: 03/07/1969
Episode 21
The Cloud Minders (50:39)
Kirk is forced into negotiating peace on a planet with severe class inequities
Aired: 02/28/1969
Episode 20
The Way to Eden (50:42)
A charismatic leader and his followers hijack the Enterprise in their search for "Eden"
Aired: 02/21/1969
Episode 19
Requiem for Methuselah (50:40)
Kirk and crew meet an immortal human named Flint
Aired: 02/14/1969
Episode 17
That Which Survives (50:40)
A deadly computer image protects a long dead outpost
Aired: 01/24/1969
Episode 16
The Mark of Gideon (50:40)
Kirk is abducted by aliens who wish to use him to help solve their overpopulation problem
Aired: 01/17/1969
Episode 15
Let That Be Your Last Battlefield (50:43)
Two survivors of a devastated planet remain committed to destroying one another
Aired: 01/10/1969
Episode 14
Whom Gods Destroy (50:44)
Kirk is confronted by one of his heroes, now criminally insane
Aired: 01/03/1969
Episode 13
Elaan of Troyius (50:40)
Kirk is distracted while the Enterprise is threatened
Aired: 12/20/1968
Episode 11
Wink of an Eye (50:40)
Hyperaccelerated aliens, invisible to the naked eye, take over the Enterprise
Aired: 11/29/1968
Episode 10
Plato's Stepchildren (50:39)
Platonians use psychokinetic power to toy with the crew
Aired: 11/22/1968
Episode 9
The Tholian Web (50:11)
Kirk is trapped in interphase, while the Enterprise is trapped by a powerful energy web
Aired: 11/15/1968
Episode 8
For the World Is Hollow and I Have Touched the Sky (50:38)
An inhabited asteroid is on a collision course with a Federation planet
Aired: 11/08/1968
Episode 7
Day of the Dove (50:41)
A malevolent entity pits Klingons against the Enterprise crew
Aired: 11/11/1968
Episode 6
Spectre of the Gun (50:37)
As punishment for trespassing, Kirk and crew are forced to re-enact the shootout at the OK Corral
Aired: 10/25/1968
Episode 5
Is There In Truth No Beauty? (50:40)
The sight of a Medusan ambassador causes insanity
Aired: 10/18/1968
Episode 4
And the Children Shall Lead (50:41)
A group of children are being controlled by an evil force
Aired: 10/11/1968
Episode 3
The Paradise Syndrome (50:40)
Kirk loses his memory and begins a life in a native village
Aired: 10/04/1968
Episode 2
The Enterprise Incident (50:42)
Disguised as a Romulan, Kirk steals a cloaking device
Aired: 09/27/1968
Episode 26
Assignment: Earth (50:18)
The Enterprise goes back in time and discovers a mysterious stranger trying to interfere with 20th-century events
Aired: 03/29/1968
Episode 25
Bread and Circuses (50:20)
Spock and McCoy are forced to fight in Roman-like games
Aired: 03/15/1968
Episode 24
The Ultimate Computer (50:19)
Enterprise is used to test the new M-5 computer
Aired: 03/08/1968
Episode 23
The Omega Glory (50:21)
The Enterprise finds a planet devastated by disease that appears to treat the American flag with great reverence
Aired: 03/01/1968
Episode 22
By Any Other Name (50:19)
Extra-galactic beings commandeer the Enterprise in an attempt to return home
Aired: 02/23/1968
Episode 21
Patterns of Force (50:20)
Enterprise is sent to planet Ekos to investigate a disappearance of Federation historian John Gill
Aired: 02/16/1968
Episode 20
Return to Tomorrow (50:21)
Telepathic aliens take over Kirk and Spock's bodies
Aired: 02/09/1968
Episode 19
A Private Little War (50:20)
The Klingons provide arms to a peaceful planet and disrupt the balance of power
Aired: 02/02/1968
Episode 18
The Immunity Syndrome (50:21)
A giant space amoeba threatens the entire galaxy
Aired: 01/19/1968
Episode 17
A Piece of the Action (50:22)
Kirk investigates a planet with an Earth-like 1920s gangster culture.
Aired: 01/12/1968
Episode 16
The Gamesters of Triskelion (50:18)
Three disembodied beings wager on fights staged by prisoners abducted from around the galaxy
Aired: 01/05/1968
Episode 15
The Trouble With Tribbles (50:19)
The Enterprise is overrun by furry creatures while tangling with Klingons and bureaucrats
Aired: 12/29/1967
Episode 14
Wolf in the Fold (50:20)
Scotty is implicated in a Jack the Ripper-style murder
Aired: 12/22/1967
Episode 13
Obsession (50:18)
Kirk is determined to hunt down a vampiric entity he failed to destroy in his past
Aired: 12/15/1967
Episode 12
The Deadly Years (50:18)
Accelerated aging affects the senior officers and threatens Kirk's ability to lead
Aired: 12/08/1967
Episode 11
Friday's Child (50:30)
The Enterprise crew becomes embroiled in a local power struggle on a tribal planet
Aired: 12/01/1967
Episode 10
Journey to Babel (50:21)
Tensions run high when the Enterprise transports ambassadors to the Babel Conferences
Aired: 11/17/1967
Episode 9
Metamorphosis (50:23)
The shuttlecraft Galileo makes a forced landing on a world with a single human inhabitant
Aired: 11/10/1967
Episode 6
The Doomsday Machine (50:33)
A machine that destroys planets threatens the Enterprise
Aired: 10/20/1967
Episode 4
Mirror, Mirror (50:25)
Kirk, Scott, McCoy and Uhura enter a parallel universe
Aired: 10/06/1967
Episode 2
Who Mourns for Adonais? (50:20)
The Enterprise is held captive by the Greek god, Apollo
Aired: 09/29/1967
Episode 30
Operation Annihilate (50:30)
The Enterprise crew saves Deneva from deadly parasites
Aired: 04/13/1967
Episode 29
The City on the Edge of Forever (50:26)
Kirk and Spock go back in time to restore history
Aired: 04/06/1967
Episode 28
The Alternative Factor (50:32)
An alien being fights himself across two realities
Aired: 03/30/1967
Episode 26
The Devil in the Dark (50:29)
An unknown monster threatens a mining operation
Aired: 03/09/1967
Episode 25
This Side of Paradise (50:24)
The Enterprise visits a colony where indigenous flower spores provide the settlers with peaceful contentment
Aired: 03/02/1967
Episode 24
A Taste of Armageddon (50:23)
The Enterprise is diverted by two planets fighting a computerized war
Aired: 02/23/1967
Episode 22
The Return of the Archons (50:23)
The Enterprise crew finds a world run by a computer named Landru
Aired: 02/09/1967
Episode 20
Tomorrow is Yesterday (50:24)
The Enterprise is thrown back to 20th century Earth
Aired: 01/26/1967
Episode 18
The Squire of Gothos (50:23)
A powerful entity known as Trelane torments the crew of the Enterprise
Aired: 01/12/1967
Episode 17
The Galileo Seven (50:23)
Seven Enterprise crew members go on a shuttle mission with Spock in command
Aired: 01/05/1967
Episode 15
Balance of Terror (50:33)
After attacking an outpost, Romulans battle the Enterprise
Aired: 12/15/1966
Episode 14
The Conscience of the King (50:31)
Kirk suspects Shakespearean actor Anton Karidian as a mass murderer
Aired: 12/08/1966
Episode 13
The Menagerie, Part 2 (50:21)
Spock hijacks the Enterprise to return an injured Captain Pike to Talos IV
Aired: 11/24/1966
Episode 12
The Menagerie, Part 1 (49:23)
Spock hijacks the Enterprise to return an injured Captain Pike to Talos IV.
Aired: 11/17/1966
Episode 11
The Corbomite Maneuver (50:28)
Kirk bluffs his way past what appears to be a powerful alien.
Aired: 11/10/1966
Episode 10
Dagger of the Mind (50:25)
A new treatment for the criminally insane has deadly results
Aired: 11/03/1966
Episode 9
Miri (50:23)
A strange group of children are discovered on an Earth-like planet
Aired: 10/27/1966
Episode 8
What are Little Girls Made Of (50:26)
Nurse Chapel's long-lost fiance is found -- along with his androids
Aired: 10/20/1966
Episode 7
Mudd's Women (50:24)
The Enterprise rescues con artist Harry Mudd and his "beautiful" female cargo.
Aired: 10/13/1966
Episode 5
The Naked Time (50:25)
The Enterprise crew catch a virus that removes their inhibitions
Aired: 09/29/1966
Episode 4
Where No Man Has Gone Before (50:25)
Kirk's friend, Gary Mitchell, is transformed into a god-like entity.
Aired: 09/22/1966
Episode 3
Charlie X (50:27)
A powerful teenage boy wreaks havoc aboard the U.S.S. Enterprise
Aired: 09/15/1966
Episode 2
The Man Trap (50:28)
A shape-shifting, salt-craving creature terrorizes the crew of Enterprise.
Aired: 09/08/1966
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