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).

KNOWN FOR

JAG
2000
The X-Files
1998
Frasier
1998
Diagnosis: Murder
1998
MacGyver
1985
Knots Landing
1990
Crossing Jordan
2002
Touched by an Angel
2000
Star Trek: Enterprise
2005
Angel
1999
The Rockford Files
1976
Knight Rider
1985

FILMOGRAPHY

All
Movies
TV
Acting
57
2014
Star Trek: Enterprise - In a Mirror, Darkly
as Adm. Gardner (Mirror)
2009
A Call to Arms
as Major General Cosgrove USMC
2007
Zodiac
as Riverside Captain
2005
Zoey 101
as Mr. Bradford
2005
Star Trek: Enterprise
as Admiral Gardner
2002
Crossing Jordan
as Police Captain
2001
Just Ask My Children
as Judge Ferguson
2001
The Division
as Barry Constansas
2000
JAG
as Admiral Rockerly
2000
Touched by an Angel
as Wally
1999
Austin Powers: The Spy Who Shagged Me
as NATO Colonel
1999
Angel
as Trevor Lockley
1999
Just Shoot Me!
as Col. Alan Drake
1999
Arli$$
as Bert Shaw
1998
Armageddon
as Karl
1998
Diagnosis: Murder
as Fire Chief
1998
The X-Files
as General Wegman
1998
Frasier
as Walt Crane
1998
The Pretender
as Eugene Clark
1997
L.A. Confidential
as Police Chief
1997
Profiler
as Det. Spitz
1995
The American President
as Chairman of the Joint Chiefs
1994
Roswell
as Red Hat Vet
1992
One False Move
as Chief Jenkins
1992
Final Shot: The Hank Gathers Story
as LMU Coach
1991
The People Under the Stairs
as Police Sergeant
1991
Flesh 'n' Blood
as Holly's Dad
1990
Jake and the Fatman
as Jameson
1990
Knots Landing
as Surveillant
1990
Knots Landing
as Superior
1990
Knots Landing
as Investigator
1989
Baywatch
as Arnold Anderson
1989
Hunter
as IAD Officer #2
1988
The Couch Trip
as Police Captain
1987
Six Against the Rock
as Officer Bill Miller
1986
Betrayed by Innocence
as Bailiff
1986
Hill Street Blues
as Mario
1985
Crazy like a Fox
as Lt. Doyle
1985
MacGyver
as Vendor
1985
St. Elsewhere
as Police Officer
1985
Hill Street Blues
as Detective McConnell
1985
Knight Rider
as Alfie Girdler
1985
Crazy like a Fox
as Zach
1985
Misfits of Science
as Technician
1985
T. J. Hooker
as Mr. Zewecki
1984
Victims for Victims: The Theresa Saldana Story
1984
Scarecrow and Mrs. King
1983
Manimal
as Man
1978
Someone's Watching Me!
as Frimsin
1978
Kojak
as I. A. D. Man
1977
A Killing Affair
as Det. Shoup
1977
Kojak
as Lawton
1977
The Rockford Files
as Victor Sherman
1976
Collision Course: Truman vs. MacArthur
as Gen. Hoyt Vandenberg
1976
The Rockford Files
as Todd Morris
1976
Police Woman
as Fireman
1973
The Exorcist
as Language Lab Director