Star Trek: Season 3
1968 · 24 episodes · ★ 6.9
What Season 3 of Star Trek
The year is 2268, and Captain James T. Kirk faces some very rough months ahead. The Enterprise, under Kirk's command, battles Romulan ships, an asteroid threatening to crash into a planet, and adventures beyond the limits of the galaxy. Kirk loses his memory, finds himself caught up in the gunfight at the O.K. Corral, and becomes trapped between alternate universes. The crew officers, led by Spock and McCoy, must maintain the courage and intelligence that made them legends of the Federation. Spock seeks logic while his shipmates are guided by instinct.
Season 3 Episodes
3x01 Spock's Brain
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 before Spock's body dies.
Directing: Marc Daniels · Writing: Gene L. Coon · Starring: Marj Dusay, Eddie Paskey, Sheila Leighton, Majel Barrett
3x02 The Enterprise Incident
The crew of the Enterprise are on a secret mission to steal a Romulan cloaking device.
Directed by: John Meredyth Lucas · Written by: D.C. Fontana · Starring: Jack Donner, Eddie Paskey, Richard Compton, Joanne Linville
3x03 The Paradise Syndrome
An alien device on a primitive planet erases Captain Kirk's memory, and he begins a new life with the planet's indigenous people.
Directing: Jud Taylor · Writer: Margaret Armen · Starring: Rudy Solari, Richard Hale, Sabrina Scharf
3x04 And the Children Shall Lead
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.
Directed by: Marvin J. Chomsky · Written by: Edward J. Lakso · Starring: Melvin Belli, Pamelyn Ferdin, Brian Tochi, Craig Huxley
3x05 Is There in Truth No Beauty?
The Enterprise travels with an alien ambassador whose appearance induces madness.
Directing: Ralph Senensky · Writing: Jean Lisette Aroeste · Starring: David Frankham, Diana Muldaur, Frank da Vinci
3x06 Spectre of the Gun
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.
Directing: Vincent McEveety · Writing: Gene L. Coon, Leroy Cronin · Starring: Charles Maxwell, Eddie Paskey, Gregg Palmer, Bill Zuckert
3x07 Day of the Dove
An alien force drives the crew of the Enterprise into brutal conflict with the Klingons.
Directing: Marvin J. Chomsky · Writing: Jerome Bixby · Starring: Michael Ansara, Mark Tobin, David L. Ross, Susan Howard
3x08 For the World Is Hollow and I Have Touched the Sky
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.
Directed by: Anton Leader · Written by: Rik Vollaerts · Starring: Katherine Woodville, Jon Lormer, Byron Morrow, Frank da Vinci
3x09 The Tholian Web
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.
Directed by: Ralph Senensky, Herb Wallerstein · Written by: Judy Burns, Chet Richards · Starring: Barbara Babcock, Frank da Vinci
3x10 Plato's Stepchildren
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 ideals.
Directed by: David Alexander · Written by: Meyer Dolinsky · Starring: Barbara Babcock, Michael Dunn, Liam Sullivan
3x11 Wink of an Eye
Invisible "time-accelerated" aliens take over the Enterprise and attempt to abduct the crew for use as "genetic stock".
Directed by: Jud Taylor · Written by: Gene L. Coon, Arthur Heinemann · Starring: Jason Evers, Kathie Browne, Geoffrey Binney, Erik Holland
3x12 The Empath
While visiting a doomed planet, the landing party is subject to torturous experiments by powerful aliens.
Directed by: John Erman · Written by: Joyce Muskat · Starring: Jason Wingreen, Kathryn Hays, Davis Roberts, Willard Sage
3x13 Elaan of Troyius
The USS Enterprise ferries a spoiled princess whose betrothal to a royal Troyian is hoped will bring peace to a star system at war.
Directing: John Meredyth Lucas · Writing: John Meredyth Lucas · Starring: France Nuyen, Dick Durock, Lee Duncan, Victor Brandt
3x14 Whom Gods Destroy
Captain Kirk faces off with a demented shape-shifting starship captain determined to control the universe.
Directing: Herb Wallerstein · Writing: Jerry Sohl, Lee Erwin · Starring: Keye Luke, Yvonne Craig, Steve Ihnat, Frank da Vinci
3x15 Let That Be Your Last Battlefield
The Enterprise encounters two duo-chromatic and mutually belligerent aliens who put the ship in the middle of their old conflict.
Directing: Herb Wallerstein, Jud Taylor · Writing: Oliver Crawford, Gene L. Coon, Leroy Cronin · Starring: Lou Antonio, Frank Gorshin, Majel Barrett, Frank da Vinci
3x16 The Mark of Gideon
A race of overpopulated aliens abduct Captain Kirk to solve their problem.
Directing: Jud Taylor · Writing: Stanley Adams, George F. Slavin · Starring: Sharon Acker, Richard Derr, David Hurst, Gene Dynarski
3x17 That Which Survives
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 rescue them.
Directed by: Herb Wallerstein · Written by: D.C. Fontana, John Meredyth Lucas · Starring: Lee Meriwether, Arthur Batanides, Kenneth Washington, Booker Bradshaw
3x18 The Lights of Zetar
Strange incorporeal aliens threaten the Memory Alpha station and the Enterprise.
Directing: Herbert Kenwith · Writing: Shari Lewis, Jeremy Tarcher · Starring: John Winston, Jan Shutan, Majel Barrett, Barbara Babcock
3x19 Requiem for Methuselah
The crew of the Enterprise encounter an immortal human in this science fiction variation on Shakespeare's The Tempest.
Directed by: Murray Golden · Written by: Jerome Bixby · Starring: Louise Sorel, James Daly
3x20 The Way to Eden
The Enterprise picks up a group of space "hippies" looking for Eden.
Directed by: David Alexander · Written by: D.C. Fontana, Arthur Heinemann · Starring: Elizabeth Rogers, Charles Napier, Mary Linda Rapelye, Deborah Downey
3x21 The Cloud Minders
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.
Directed by: Jud Taylor · Written by: Oliver Crawford, David Gerrold, Margaret Armen · Starring: Jeff Corey, Fred Williamson, Diana Ewing, Charlene Polite
3x22 The Savage Curtain
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.
Directing: Herschel Daugherty · Writing: Gene Roddenberry, Arthur Heinemann · Starring: Barry Atwater, Lee Bergere, Phillip Pine, Janos Prohaska
3x23 All Our Yesterdays
Kirk, Spock and McCoy are trapped in two parts of another planet's past - a world threatened with destruction when its sun goes supernova.
Directed by: Marvin J. Chomsky · Written by: Jean Lisette Aroeste · Starring: Mariette Hartley, Johnny Haymer, Kermit Murdock, Ian Wolfe
3x24 Turnabout Intruder Season Finale
The Enterprise is in danger when Janice Lester, one of Kirk's former lovers, steals his body.
Directing: Herb Wallerstein · Writing: Gene Roddenberry, Arthur Singer · Starring: Harry Landers, David L. Ross, Sandra Smith, Barbara Baldavin
Season 3 Cast
James DoohanScott24 episodes
Walter KoenigPavel Chekov24 episodes
Frank da VinciClifford Brent12 episodes
Eddie PaskeyLieutenant Leslie (uncredited)3 episodes
Barbara BabcockLights of Zetar (voice)3 episodes
Majel BarrettChristine Chapel3 episodes
Victor BrandtTongo Rad2 episodes
Richard ComptonTechnical Officer2 episodes
David L. RossJohnson2 episodes
Elizabeth RogersLt. PalmerEpisode 1
Jason EversRaelEpisode 1
Lou AntonioLokaiEpisode 1
All Seasons
Season 11966 · 29 eps · 
Season 21967 · 26 eps · Where to Watch Season 3 of Star Trek
It is currently not available on the major streaming platforms.
Frequently Asked Questions
How Many Episodes Are in Star Trek Season 3?
Star Trek Season 3 has 24 episodes.
When did Star Trek Season 3 premiere?
Premiered on September 20, 1968.
Where to Watch Star Trek Season 3?
Currently not available on the major subscription platforms (availability may vary by country).
What is the best episode of Season 3?
Según la nota del público en TMDB, el 3x23, «All Our Yesterdays», con un 7.9.