A supporting actor, Castle began appearing on screen in 1966. He went on to take supporting and starring roles in a wide variety of movies - most recently Ronald F. Maxwell's 2003 film "God and Generals".
Filmography: Gods and Generals (2003), Little Lord Fauntleroy (1995), Robocop 3 (1993), Sherlock Holmes - The Crucifer of Blood (1991), Dealers (1989), Lillie (1979), Antony and Cleopatra (1973), Man of La Mancha (1972), The Lion in Winter (1968), Blowup (1967).