Star Trek: Season 3
Season 3 Lore Primer
Key plot threads, lore context, and character stakes you need to remember before diving into this season.
- Picks up essential narrative continuity directly following the events of Star Trek Season 2.
- Character alliances, factions, and personal loyalties undergo significant shifts under escalating stakes.
- Addresses unresolved cliffhangers and thematic mysteries introduced during previous seasons.
- Establishes the primary seasonal conflict that drives serialized character arcs toward the finale.
Episode Guide
Season 3 Progress Shield
Spock's Brain
Sep 20, 1968 · 51 min
An 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 b
The Enterprise Incident
Sep 27, 1968 · 51 min
The crew of the Enterprise are on a secret mission to steal a Romulan cloaking device.
The Paradise Syndrome
Oct 4, 1968 · 51 min
An alien device on a primitive planet erases Captain Kirk's memory, and he begins a new life with the planet's indigenous people.
And the Children Shall Lead
Oct 11, 1968 · 51 min
On 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.
Is There in Truth No Beauty?
Oct 18, 1968 · 51 min
The Enterprise travels with an alien ambassador whose appearance induces madness.
Spectre of the Gun
Oct 25, 1968 · 51 min
Having 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.
Day of the Dove
Nov 1, 1968 · 51 min
An alien force drives the crew of the Enterprise into brutal conflict with the Klingons.
For the World Is Hollow and I Have Touched the Sky
Nov 8, 1968 · 51 min
The 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.
The Tholian Web
Nov 15, 1968 · 50 min
Captain 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.
Plato's Stepchildren
Nov 22, 1968 · 51 min
The 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 ide
Wink of an Eye
Nov 29, 1968 · 51 min
Invisible "time-accelerated" aliens take over the Enterprise and attempt to abduct the crew for use as "genetic stock".
The Empath
Dec 6, 1968 · 51 min
While visiting a doomed planet, the landing party is subject to torturous experiments by powerful aliens.
Elaan of Troyius
Dec 20, 1968 · 51 min
The USS Enterprise ferries a spoiled princess whose betrothal to a royal Troyian is hoped will bring peace to a star system at war.
Whom Gods Destroy
Jan 3, 1969 · 51 min
Captain Kirk faces off with a demented shape-shifting starship captain determined to control the universe.
Let That Be Your Last Battlefield
Jan 10, 1969 · 51 min
The Enterprise encounters two duo-chromatic and mutually belligerent aliens who put the ship in the middle of their old conflict.
The Mark of Gideon
Jan 17, 1969 · 51 min
A race of overpopulated aliens abduct Captain Kirk to solve their problem.
That Which Survives
Jan 24, 1969 · 51 min
Kirk, 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 re
The Lights of Zetar
Jan 31, 1969 · 51 min
Strange incorporeal aliens threaten the Memory Alpha station and the Enterprise.
Requiem for Methuselah
Feb 14, 1969 · 51 min
The crew of the Enterprise encounter an immortal human in this science fiction variation on Shakespeare's The Tempest.
The Way to Eden
Feb 21, 1969 · 51 min
The Enterprise picks up a group of space "hippies" looking for Eden.
The Cloud Minders
Feb 28, 1969 · 51 min
Captain 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.
The Savage Curtain
Mar 7, 1969 · 51 min
Aliens 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.
All Our Yesterdays
Mar 14, 1969 · 51 min
Kirk, Spock and McCoy are trapped in two parts of another planet's past - a world threatened with destruction when its sun goes supernova.
Turnabout Intruder
Jun 3, 1969 · 51 min
The Enterprise is in danger when Janice Lester, one of Kirk's former lovers, steals his body.