John Patrick Mahon (February 2, 1938 - May 3, 2020) was an American film, stage and television actor. He was known for Armageddon (1998), L.A. Confidential (1997) and Zodiac (2007).
A Call to Arms
Major General Cosgrove USMC
The Couch Trip
Police Captain
A Killing Affair
Det. Shoup
Someone's Watching Me!
Frimsin
The American President
Chairman of the Joint Chiefs
Collision Course: Truman vs. MacArthur
Gen. Hoyt Vandenberg
Six Against the Rock
Officer Bill Miller
Victims for Victims: The Theresa Saldana Story
One False Move
Chief Jenkins
Final Shot: The Hank Gathers Story
LMU Coach
The People Under the Stairs
Police Sergeant
L.A. Confidential
Police Chief
Armageddon
Karl
Just Ask My Children
Judge Ferguson
Betrayed by Innocence
Bailiff
Austin Powers: The Spy Who Shagged Me
NATO Colonel
The Exorcist
Language Lab Director
Zodiac
Riverside Captain
Roswell
Red Hat Vet