Season 3
24 episodes · Sep 20, 1968
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S3E1Spock's Brain
Sep 20, 196851mAn alien female beams aboard the ship and, after incapacitating the rest of the crew, surgically removes Spock's brain. Kirk and the crew have just hours to locate and replace it before Spock's body dies.
S3E2The Enterprise Incident
Sep 27, 196851mThe crew of the Enterprise are on a secret mission to steal a Romulan cloaking device.
S3E3The Paradise Syndrome
Oct 4, 196851mAn alien device on a primitive planet erases Captain Kirk's memory, and he begins a new life with the planet's indigenous people.
S3E4And the Children Shall Lead
Oct 11, 196851mOn a distant planet, Kirk, Spock and McCoy find a scientific team dead, and their children who, unknown to the crew, have great powers at their disposal.
S3E5Is There in Truth No Beauty?
Oct 18, 196851mThe Enterprise travels with an alien ambassador whose appearance induces madness.
S3E6Spectre of the Gun
Oct 25, 196851mHaving been found trespassers into Melkotian space, Captain Kirk and his companions are sent to die in a re-enactment of the gunfight at the O.K. Corral.
S3E7Day of the Dove
Nov 1, 196851mAn alien force drives the crew of the Enterprise into brutal conflict with the Klingons.
S3E8For the World Is Hollow and I Have Touched the Sky
Nov 8, 196851mThe crew of the Enterprise rush to stop an asteroid from colliding with a Federation world, but discover the asteroid is actually an inhabited generation ship.
S3E9The Tholian Web
Nov 15, 196850mCaptain Kirk is caught between dimensions while the crew of the Enterprise works to retrieve him. All the while, the Tholians demand that the Enterprise leave their space.
S3E10Plato's Stepchildren
Nov 22, 196851mThe crew of the Enterprise encounters an ageless and sadistic race of humanoids with the power of telekinesis and who claim to have organized their society around Ancient Greek ideals.
S3E11Wink of an Eye
Nov 29, 196851mInvisible "time-accelerated" aliens take over the Enterprise and attempt to abduct the crew for use as "genetic stock".
S3E12The Empath
Dec 6, 196851mWhile visiting a doomed planet, the landing party is subject to torturous experiments by powerful aliens.
S3E13Elaan of Troyius
Dec 20, 196851mThe USS Enterprise ferries a spoiled princess whose betrothal to a royal Troyian is hoped will bring peace to a star system at war.
S3E14Whom Gods Destroy
Jan 3, 196951mCaptain Kirk faces off with a demented shape-shifting starship captain determined to control the universe.
S3E15Let That Be Your Last Battlefield
Jan 10, 196951mThe Enterprise encounters two duo-chromatic and mutually belligerent aliens who put the ship in the middle of their old conflict.
S3E16The Mark of Gideon
Jan 17, 196951mA race of overpopulated aliens abduct Captain Kirk to solve their problem.
S3E17That Which Survives
Jan 24, 196951mKirk, McCoy, and Sulu are stranded on a barren planet where a mysterious woman attempts to kill them one at a time, while the Enterprise must travel halfway across the galaxy to rescue them.
S3E18The Lights of Zetar
Jan 31, 196951mStrange incorporeal aliens threaten the Memory Alpha station and the Enterprise.
S3E19Requiem for Methuselah
Feb 14, 196951mThe crew of the Enterprise encounter an immortal human in this science fiction variation on Shakespeare's The Tempest.
S3E20The Way to Eden
Feb 21, 196951mThe Enterprise picks up a group of space "hippies" looking for Eden.
S3E21The Cloud Minders
Feb 28, 196951mCaptain Kirk races against time to acquire plague-fighting minerals from a world in the midst of a civil uprising against a grievous social class disparity.
S3E22The Savage Curtain
Mar 7, 196951mAliens force Captain Kirk and First Officer Spock to join forces with "Abraham Lincoln" and "Surak" to battle villains in a contest of good vs. evil.
S3E23All Our Yesterdays
Mar 14, 196951mKirk, Spock and McCoy are trapped in two parts of another planet's past - a world threatened with destruction when its sun goes supernova.
S3E24Turnabout Intruder
Jun 3, 196951mThe Enterprise is in danger when Janice Lester, one of Kirk's former lovers, steals his body.