Stardate 4842.6: Kirk, Spock and McCoy beam down to a planet to inform any inhabitants that they must evacuate the planet due to an approaching asteroid's imminent collision. A society similar to Native American Indians has arisen on the planet, but near their villages, the landing party finds a strange obelisk whose design and construction is far beyond the capabilities of the planet's natives. Kirk finds that the monolith can be opened by the combination of sounds found in the order "Kirk to Enterprise", but when he enters the obelisk, he is attacked by waves of energy that erase his mind. With no time to spare, Spock and McCoy have to return to the Enterprise without Kirk, and begin trying to use the ship's tractor beam to divert the asteroid. Meanwhile, Kirk becomes the tribal chief, takes a wife and even expects to become a father, but the Enterprise may not be able to save her former captain's future.
s03e01 - Spock's Brain
s03e02 - The Enterprise Incident
s03e03 - The Paradise Syndrome
s03e04 - And the Children Shall Lead
s03e05 - Is There in Truth No Beauty?
s03e06 - Spectre of the Gun
s03e07 - Day of the Dove
s03e08 - For the World is Hollow and I Have Touched the Sky
s03e09 - The Tholian Web
s03e10 - Plato's Stepchildren
s03e11 - Wink of an Eye
s03e12 - The Empath
s03e13 - Elaan of Troyius
s03e14 - Whom Gods Destroy
s03e15 - Let That Be Your Last Battlefield
s03e16 - The Mark of Gideon
s03e17 - That Which Survives
s03e18 - The Lights of Zetar
s03e19 - Requiem for Methuselah
s03e20 - The Way to Eden
s03e21 - The Cloud Minders
s03e22 - The Savage Curtain
s03e23 - All Our Yesterdays
s03e24 - Turnabout Intruder
Star Trek chronicles the 23rd century adventures of the U.S.S. Enterprise, one of twelve state-of-the-art starships representing Starfleet, the exploration branch of the United Federation of Planets, an alliance of alien races including Earth, Vulcan, Tellar, and Andor.
Captain James T. Kirk, the youngest starship captain in the Fleet, commands the Enterprise with a combination of brashness, authority, and imagination. The half-Vulcan/half-human Mr. Spock serves as his extremely logical and efficient First Officer and Science Officer. The ship's chief medical officer is Dr. Leonard McCoy, who has supreme medical authority on the ship and tends to the physical and mental needs of the Enterprise's crew of approximately 430.
Other ranking crew members include: Montgomery Scott, a man dedicated to his ship engines but not adverse to a bit of shore leave; Hikaru Sulu, helmsman and a man of many hobbies ranging from botany to fencing, Nyota Uhura, the extremely competent head of Communications, and Pavel Chekov, brash young navigator with a fierce pride in his native Russia.