John Mahon
- Compleanno:
- 02/02/1938
- Luogo di nascita:
- Scranton, Pennsylvania, USA:
 | A Call to Arms (2009) Major General Cosgrove USMC |
 | Zodiac (2007) Riverside Captain |
 | Just Ask My Children (2001) Judge Ferguson |
 | Austin Powers: The Spy Who Shagged Me (1999) NATO Colonel |
 | Armageddon (1998) Karl |
 | L.A. Confidential (1997) Police Chief |
 | The American President (1995) Chairman of the Joint Chiefs |
 | Final Shot: The Hank Gathers Story (1992) LMU Coach |
 | The People Under the Stairs (1991) Police Sergeant |
 | One False Move (1991) Chief Jenkins |
 | The Couch Trip (1988) Police Captain |
 | Six Against the Rock (1987) Officer Bill Miller |
 | Betrayed by Innocence (1986) Bailiff |
 | Victims for Victims: The Theresa Saldana Story (1984) |
 | Someone's Watching Me! (1978) Frimsin |
 | A Killing Affair (1977) Det. Shoup |
 | Collision Course: Truman vs. MacArthur (1976) Gen. Hoyt Vandenberg |
 | The Exorcist (1973) Language Lab Director |