From: Star Trek: The Original Series
Caption: Lockwood at Star Trek Las Vegas
The first friend of James T. Kirk we are introduced to is not Spock, but his Academy classmate and navigator, Gary Mitchell—played by busy actor Gary Lockwood. A mere five years later would bring Lockwood’s role of a lifeitme, as astronaut Frank Poole in 2001: A Space Odyssey. Lockwood, born “John Gary Yurosek” in 1937 in Van Nuys, Calif., was a stunt man before amassing a long resume of over 40 features and 80 TV guest roles. He also played the lead in Gene Roddenberry’s one-year NBC series about the peacetime Marines, The Lieutenant, made the year before the producer brought him back for Star Trek.