Robert Martin Culp (August 16, 1930March 24, 2010) was an American actor, screenwriter, voice actor and director, widely known for his work in television. Culp earned an international reputation for his role as Kelly Robinson on I Spy (1965–1968), the espionage series in which he and co-star Bill Cosby played a pair of secret agents. Prior to that, he starred in the CBS/Four Star western series, Trackdown as Texas Ranger Hoby Gilman from 1957-1959.