John Newman Mitchum, often credited as Jack Newman early in his career, was known for roles in 58 films and over 150 television appearances. John's roles had him playing alongside a wide range of celebrities, from Humphrey Bogart in Knock On Any Door (1949) to Gladys Knight in Pipe Dreams (1976), Clint Eastwood of Dirty Harry (1971) to John Wayne in Chisum (1970).