Patrick appeared in more than 1800 guest roles on television programs during his four-decade career, including stints on Tales of Tomorrow (1952), Kraft Theatre (1949–57), Gunsmoke (1958), Playhouse 90 (1958), Sugarfoot (1959), Buckskin (1959), Peter Gunn (1959), U.S. Marshal (1959-1960), 77 Sunset Strip (1960), Bonanza (1960), Wanted: Dead or Alive (1960), Alfred Hitchcock Presents (1960–61); Hawaiian Eye (1962), The Virginian (1962), Laramie (1960-1963), Perry Mason (1959-1966), Empire (as Hoot Hinkley in "The Tiger Inside", 1963), The Dakotas (1963), Lost in Space (1966, as Keema "The Golden Man"), Dark Shadows (1967-1970), Emergency! (three episodes, 1972-1975) and Dallas (1979-1984, as Vaughn Leland), Quincy, M.E., (three episodes, 1979-82), The Incredible Hulk, (as Buck Hendricks, a Big Game Hunter looking to help Jack McGee capture "The jolly green Giant")