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Biography
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).
Filmography38 titles

Final Shot: The Hank Gathers Story
1992as LMU Coach
1992as LMU Coach

The X-Files
1993as General Wegman
1993as General Wegman

Zoey 101
2005as Mr. Bradford
2005as Mr. Bradford

Angel
1999as Trevor Lockley
1999as Trevor Lockley

L.A. Confidential
1997as Police Chief
1997as Police Chief

Frasier
1993as Walt Crane
1993as Walt Crane

MacGyver
1985as Vendor
1985as Vendor

The Exorcist
1973as Language Lab Director
1973as Language Lab Director

Hill Street Blues
1981as Mario
1981as Mario

The Rockford Files
1974as Victor Sherman
1974as Victor Sherman

Zodiac
2007as Riverside Captain
2007as Riverside Captain

Star Trek: Enterprise
2001as Admiral Gardner
2001as Admiral Gardner

Knight Rider
1982as Alfie Girdler
1982as Alfie Girdler

The Pretender
1996as Eugene Clark
1996as Eugene Clark

JAG
1995as Admiral Rockerly
1995as Admiral Rockerly

Crossing Jordan
2001as Police Captain
2001as Police Captain

Touched by an Angel
1994as Wally
1994as Wally

Kojak
1973as I. A. D. Man
1973as I. A. D. Man

Diagnosis: Murder
1993as Fire Chief
1993as Fire Chief

Hunter
1984as I.A.D. Officer #2
1984as I.A.D. Officer #2

Profiler
1996as Det. Spitz
1996as Det. Spitz

Knots Landing
1979as Investigator
1979as Investigator

Just Ask My Children
2001as Judge Ferguson
2001as Judge Ferguson

Armageddon
1998as Karl
1998as Karl

Arli$$
1996as Bert Shaw
1996as Bert Shaw

Just Shoot Me!
1997as Col. Alan Drake
1997as Col. Alan Drake

The People Under the Stairs
1991as Police Sergeant
1991as Police Sergeant

One False Move
1991as Chief Jenkins
1991as Chief Jenkins

Scarecrow and Mrs. King
1983
1983

The American President
1995as Chairman of the Joint Chiefs
1995as Chairman of the Joint Chiefs

T. J. Hooker
1982as Mr. Zewecki
1982as Mr. Zewecki

Police Woman
1974as Fireman
1974as Fireman

Austin Powers: The Spy Who Shagged Me
1999as NATO Colonel
1999as NATO Colonel

Betrayed by Innocence
1986as Bailiff
1986as Bailiff

Someone's Watching Me!
1978as Frimsin
1978as Frimsin

Baywatch
1989as Arnold Anderson
1989as Arnold Anderson

St. Elsewhere
1982as Police Officer
1982as Police Officer

The Couch Trip
1988as Police Captain
1988as Police Captain