
John P. "J.P." Finnegan was an American film and television actor, mostly known for his recurrent role on the American crime fiction series Columbo. He voiced the villainous character Warren T. Rat in the 1986 Don Bluth film An American Tail.


























2000The Independent as Guard
1997Beyond Belief: Fact or Fiction (1 Episode) as Jerome Metz (segment "The Magic Rose Garden")
1997Vegas Vacation as Hoover Dam Guide
1996Mars Attacks! as Speaker of the House
1994ER (1 Episode) as Mitchell
1993Last Action Hero as Watch Commander
1991JFK as Judge Haggerty
1990Come See the Paradise as Brennan
1990The Knife and Gun Club as Mr. Warshawski
1990The Last of the Finest as Tommy Grogan
1989Big Man on Campus as Judge Ferguson
1989Finish Line as Purdy Hall
1986An American Tail as Warren T. Rat (voice)
1986Big Trouble as Det. Murphy
1986The Deacon Street Deer as Sidney
1985The Journey of Natty Gann as Logging Boss
1984The Hoboken Chicken Emergency as Policeman
1984Murder, She Wrote (1, 1 Episode) as Uncle Charlie, Douglas Foudy
1984The Natural as Sam Simpson
1984Love Streams as Taxi Driver (Animals)
1982Terror at Alcatraz as Murphy
1982Rehearsal for Murder as Damon
1980Gloria as Frank
1980Little Miss Marker as Casino Clerk
1979The In-Laws as Deliveryman #1
1978Bloodbrothers as Bartender
1978The Amazing Spider-Man (1 Episode) as Unknown
1978Nowhere to Run as O'Neil
1977Opening Night as Bobby
1977Heroes as Mr. Munro
1977Lucan as Jess
1976Nickelodeon as Kathleen's Director
1976Quincy, M.E. (1 Episode) as Joe Ives
1976Rich Man, Poor Man - Book II (1 Episode) as Reporter
1976Street Killing as Alex Lesko
1976The Killing of a Chinese Bookie as Taxi Driver
1976Mallory: Circumstantial Evidence as Deputy Marshal Vieter
1975Capone as N.Y. Police Lt.
1975Conspiracy of Terror as Sgt. Carroll
1975Ellery Queen: Too Many Suspects as Matthew Thomas Cleary
1974A Woman Under the Influence as Clancy
1974Terror on the 40th Floor as Stark
1972Play It as It Lays as Frank
1972Banacek (1 Episode) as Lt. Hallohan
1971Columbo (1, 1, 1, 1, 1, 3, 1, 1, 1, 1 Episode) as Guard, Police Chief, Lieutenant Dreyer, Sean Jarvis, Carl, Barney, Sergeant, Quentin Corbett, Workman #1, Assistant Director