William Shatner as Captain Kirk in Star Trek TOS

William Shatner (center) as Captain James T. Kirk is flanked by Leonard Nimoy (left) as Lt. Cmdr. Spock and James Doohan as chief engineer Scott on the TV series Star Trek. This was the original series (that is, TOS), which ran from 1966 to 1969. The series followed the voyages of the starship Enterprise as its crew visited alien worlds, several centuries in the future.