[1] Doubleday was born in Norwich, Connecticut and moved to Los Angeles with his family as a child.

[2] Doubleday's films included Assault on Precinct 13 (1976) and Escape from New York (1981), both directed by John Carpenter.

[1] In the special edition Escape from New York DVD commentary, Kurt Russell credits Doubleday's performance as setting the tone of the movie.

He made his film debut in The First Nudie Musical (1976), and his other film credits include roles in Alex & the Gypsy (1976), The Big Fix (1978), Butch and Sundance: The Early Days (1979), Avenging Angel (1985), Nomads (1986), Broadcast News (1987), L.A. Bounty (1989), and Dollman (1991).

[3] Doubleday died of complications from esophageal cancer at age 73 at his Los Angeles home on March 3, 2018.