Promotional photo of the cast of Star Trek during the third season (1968–1969). From left to right: James Doohan, Walter Koenig, DeForest Kelley, Majel Barrett, William Shatner, Nichelle Nichols, Leonard Nimoy, and George Takei. The first regular episode of Star Trek, "The Man Trap" aired at 7:30 p.m. on Sept. 8, 1966 as part of an NBC "sneak preview." (Courtesy: Paramount Pictures)