While on a routine expedition to Omega 4, the Enterprise arrives to find another starship, the U.S.S. Exeter, in orbit circling the planet. Kirk and a party go to the ship and find it abandoned and everyone on board completely drained of water leaving behind only bodily minerals. They check the log and are warned not to return to their ship, so go to the surface of the planet and find Captain Tracey... who is now in charge of the local civilization.
s02e01 - Amok Time
s02e02 - Who Mourns for Adonais?
s02e03 - The Changeling
s02e04 - Mirror, Mirror
s02e05 - The Apple
s02e06 - The Doomsday Machine
s02e07 - Catspaw
s02e08 - I, Mudd
s02e09 - Metamorphosis
s02e10 - Journey to Babel
s02e11 - Friday's Child
s02e12 - The Deadly Years
s02e13 - Obsession
s02e14 - Wolf in The Fold
s02e15 - The Trouble With Tribbles
s02e16 - The Gamesters of Triskelion
s02e17 - A Piece of the Action
s02e18 - The Immunity Syndrome
s02e19 - A Private Little War
s02e20 - Return to Tomorrow
s02e21 - Patterns of Force
s02e22 - By Any Other Name
s02e23 - The Omega Glory
s02e24 - The Ultimate Computer
s02e25 - Bread and Circuses
s02e26 - Assignment: Earth
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.