Education: Graduated from the University of Scranton with a degree in classical languages.
Agent—House of Representatives, 400 South Beverly Dr., Suite 101, Beverly Hills, CA 90212.
Actor, producer, director, and writer. Previously worked as a chemical engineer.
New York Drama Critics Award nomination, for Nobody Hears a Broken Drum; won directing award for That Championship Season.
(Uncredited) Language lab director, The Exorcist (also known as "The Exorcist": The Version You Haven't Seen Yet, "The Exorcist: The Version You've Never Seen, and William Peter Blatty's "The Exorcist"), Warner Bros. 1973.
Police captain, The Couch Trip, Orion, 1988.
Dr. Fielding, Bad Influence, Triumph Releasing Corp., 1990.
Chief Jenkins, One False Move, IRS Media, 1991.
Police Sergeant, The People Under the Stairs (also known as Wes Craven's "The People Under the Stairs"), Universal, 1992.
Chairman of the Joint Chiefs, The American President, Universal, 1995.
Police chief, L.A. Confidential, Warner Bros., 1997.
Karl, Armageddon, Buena Vista, 1998.
NATO Colonel, Austin Powers: The Spy Who Shagged Me (also known as Austin Powers 2: The Spy Who Shagged Me), New Line Cinema, 1999.
Riverside captain, Zodiac, Paramount, 2007.
Knight Fever, Sunn Classic Pictures, 2008.
Brother of the Wind (also known as Frere du vent), Sun International, 1972.
Television Appearances; Series:
George, Studio 60 on the Sunset Strip (also known as Studio 60), NBC, 2006-2007.
Television Appearances; Miniseries:
Mr. Cleaves, Sinatra, CBS, 1992.
Television Appearances; Movies:
General Hoyt Vandenburg, Collision Course: Truman vs. MacArthur (also known as Collision Course), 1976.
Detective Shoup, A Killing Affair (also known as Behind the Badge), CBS, 1977.
Frimsin, Someone's Watching Me! (also known as High Rise), NBC, 1978.
Victim for Victims: The Theresa Saldana Story (also known as Victims for Victims), 1984.
Betrayed by Innocence (also known as Jailbait: Betrayed by Innocence), 1986.
Convicted: A Mother's Story, 1987.
Officer Bill Miller, Six Against the Rock, 1987.
Deputy Chief Evans, Shakedown on the Sunset Strip, CBS, 1988.
Police captain, The Couch Trip, 1988.
Inspector Hedges, Murder without Motive: The Edmund Perry Story (also known as Best Intentions), NBC, 1992.
LMU coach, Final Shot: The Hank Gathers Story, syndicated, 1992.
Lifepod, Fox, 1993.
Coach Dickler, Natural Selection (also known as Dark Reflection), 1994.
Red Hat vet, Roswell (also known as Incident at Roswell and Roswell: The U.F.O. Cover-Up), Showtime, 1994.
Judge Ferguson, Just Ask My Children, Lifetime, 2001.
Television Appearances; Specials:
Billy Crystal: Midnight Train to Moscow, 1989.
"The Promise of Steve Wilkins," Rock the Vote, 1992.
Television Appearances; Episodic:
SWAT Commander, "To Kill a Tank," The Blue Knight, 1976.
Todd Morris, "Foul on the First Play," The Rockford Files (also known as Jim Rockford, Private Investigator), NBC, 1976.
Lieutenant Hayes, "Return to the Thirty-eighth Parallel," The Rockford Files (also known as Jim Rockford, Private Investigator), NBC, 1976.
Victor Sherman, "There's One in Every Port," The Rockford Files (also known as Jim Rockford, Private Investigator), NBC, 1977.
Man, "Breath of the Dragon," Manimal, NBC, 1983.
"Remembrance of Things Past," Scarecrow and Mrs. King, CBS, 1984.
Policeman, "Zippers," Automan, ABC, 1984.
Mr. Zewecki, "The Chicago Connection," T. J. Hooker, ABC, 1985.
Military police, "Guess What's Coming to Dinner," Misfits of Science, NBC, 1985.
Vendor, "The Prodigal," MacGyver, ABC, 1985.
Police officer, "Cheers," St. Elsewhere, 1985.
Alfie Girdler, "Knight Rider," Knight Rider, 1985.
Det. McConnell, "Dr. Hoof and Mouth," Hill Street Blues, 1985.
Mario, "Say It as It Plays," Hill Street Blues, 1986.
Desk sergeant, "Sometimes You Gotta Sing the Blues," Stingray, NBC, 1986.
"Dead Pigeon," Mike Hammer (also known as Mickey Spillane's "Mike Hammer" and The New Mike Hammer), 1986.
Chapell, "Aria da Capo," Hooperman, ABC, 1987.
"Shoot to Kill," Hunter, NBC, 1989.
Arnold Anderson, "The Cretin of the Shallows," Baywatch, NBC, 1989.
Captain Holgar, "A Tale of Two Cities," Dallas, CBS, 1990.
"Adamant Eve," Mancuso, FBI, 1990.
Surveillant, "The Grim Reaper," Knots Landing, CBS, 1990.
Superior, "Wrong for Each Other," Knots Landing, CBS, 1990.
Investigator, "The Fan Club," Knots Landing, CBS, 1990.
"You Took Advantage of Me," Jake and the Fatman, CBS, 1990.
Bus driver, "When the Stars Begin to Fall," Homefront, 1992.
"Death before Dishonor," Space Rangers, CBS, 1993.
Dave, Cutters, 1993.
Detective Spitz, "Blue Highway," Profiler, NBC, 1997.
Eugene Clark, "A Stand-Up Guy," The Pretender, NBC, 1998.
Gene Donovan, "Dead Man Sleeping," Brooklyn South, CBS, 1998.
Fire chief, "Resurrection: Part 1," Diagnosis Murder, CBS, 1998.
General Wegman, "Dreamland: Parts 1 & 2," The X-Files, Fox, 1998.
Uncle Walter "Walt" Crane, "Beware of Greeks," Frasier, NBC, 1999.
"You Gotta Love This Game," Arli$$, 1999.
Alan Drake, "Blackmail Photographer," Just Shoot Me, NBC, 1999.
Trevor Lockley, "Sense and Sensitivity," Angel, The WB, 1999.
Sergeant Staley, Martial Law, CBS, 1999.
Trevor Lockley, "The Prodigal," Angel, The WB, 2000.
Wally, "A Clown's Prayer," Touched by an Angel, CBS, 2000.
"A Separate Peace: Part 2," JAG, CBS, 2000.
Leo, "Touched by a Biker," That's Life, 2001.
Barry Constansas, "What Sharp Teeth You Have," The Division (also known as Heart of the City), 2001.
Agent Milton, "The Devil Still Holds My Hand," Strange World, ABC, 2002.
"Payback," Crossing Jordan, NBC, 2002.
Colonel, "The Plan," Cold Case, CBS, 2004.
Mr. Bradford, "Prank Week," Zoey 101, Nickelodeon, 2005.
Admiral Gardner, "In a Mirror, Darkly: Part 2," Enterprise (also known as Star Trek: Enterprise), UPN, 2005.
Also appeared as Paul Catteo, "What the Past Will Bring," Bull.
Understudy Mr. Stein, Joe, Stanley, Joe, and Adam, Monopoly, Stage 73, New York City, 1966.
Pequod, Mercury Theatre, New York City, 1969.
Lebedev, Subject to Fits, Public Theatre, New York City, 1971.
Alderman, bearer, citizen, Anthony Woodville, Earl Rivers, and John Howard, King Richard III, Cort Theatre, New York City, 1979.
Also appeared in Arturo Vi, New York Shakespeare Festival, New York City; Subject to Fits, New York Shakespeare Festival; Nobody Hears a Broken Drum, New York City; The Prime of Miss Jean Brodie, U.S. cities.
Directed productions of Camelot, Hair; Who's Afraid of Virginia Wolf; That Championship Season.
Brother of the Wind (also known as Frere du vent), Sun International, 1972.
"Mahon, John." Contemporary Theatre, Film and Television. . Encyclopedia.com. (January 21, 2019). https://www.encyclopedia.com/education/news-wires-white-papers-and-books/mahon-john
"Mahon, John." Contemporary Theatre, Film and Television. . Retrieved January 21, 2019 from Encyclopedia.com: https://www.encyclopedia.com/education/news-wires-white-papers-and-books/mahon-john
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