Ao lado de sua tribulação na Enterprise, o capitão James T. Kirk (William Shatner) explora a galáxia e defende a Federação Unida dos Planetas. Ele conta com a ajuda de Spock (Leonard Nimoy), McCoy (DeForest Kelley), Uhura (Nichelle Nichols), Scott (James Doohan), Sulu (George Takei), Chekov (Walter Koenig) e companhia.

• Lista de Episódios •

2×01 – Amok Time
2×02 – Who Mourns for Adonais?
2×03 – The Changeling
2×04 – Mirror, Mirror
2×05 – The Apple
2×06 – The Doomsday Machine
2×07 – Catspaw
2×08 – I, Mudd
2×09 – Metamorphosis
2×10 – Journey to Babel
2×11 – Friday’s Child
2×12 – The Deadly Years
2×13 – Obsession
2×14 – Wolf in the Fold
2×15 – The Trouble with Tribbles
2×16 – The Gamesters of Triskelion
2×17 – A Piece of the Action
2×18 – The Immunity Syndrome
2×19 – A Private Little War
2×20 – Return to Tomorrow
2×21 – Patterns of Force
2×22 – By Any Other Name
2×23 – The Omega Glory
2×24 – The Ultimate Computer
2×25 – Bread and Circuses
2×26 – Assignment: Earth (Season Finale)