Mary Dingman (born September 19, 1940) known by her stage name Mary Mitchel, is an American actress, known for Dementia 13 (1963), in which she appeared with her real-life husband Bart Patton. (The two had attended UCLA with Dementia 13's 23-year-old writer-director Francis Ford Coppola.) When her acting career later stalled, Mitchel sought jobs behind the scenes, working in different capacities on a variety of motion pictures, many of them Coppola productions (The Godfather (1972), Apocalypse Now (1979), Bram Stoker's Dracula (1992), and more). Her son Tyler Patton is a set dresser/property master/actor.
She appeared in two Hogan's Heroes episodes, Request Permission to Escape, as Mady, and Everyone Has a Brother-in-Law, as Eva.