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.
Known for Mars Attacks! 1996 Last Action Hero 1993 JFK 1991 An American Tail 1986 ★ 5.6 The Independent 2000
Guard ★ 6 Vegas Vacation 1997
Hoover Dam Guide Series ★ 7.3 Beyond Belief: Fact or Fiction 1997
Jerome Metz (segment "The Magic Rose Garden") ★ 6.4 Mars Attacks! 1996
Speaker of the House Series ★ 7.8 ER 1994
Mitchell ★ 6.5 Last Action Hero 1993
Watch Commander ★ 7.6 JFK 1991
Judge Haggerty ★ 5.9 The Last of the Finest 1990
Tommy Grogan ★ 6.2 Come See the Paradise 1990
Brennan ★ 6.2 Big Man on Campus 1989
Judge Ferguson ★ 6.8 An American Tail 1986
Warren T. Rat (voice) ★ 5.4 Big Trouble 1986
Det. Murphy Series ★ 7 Matlock 1986
Mr. Gillespie ★ 6.8 The Journey of Natty Gann 1985
Logging Boss ★ 7.2 Love Streams 1984
Taxi Driver (Animals) ★ 6.9 The Natural 1984
Sam Simpson Series ★ 7.5 Murder, She Wrote 1984
Uncle Charlie ★ 6.9 Gloria 1980
Frank ★ 6.6 Little Miss Marker 1980
Casino Clerk ★ 6.6 The In-Laws 1979
Deliveryman #1 ★ 5.8 Bloodbrothers 1978
Bartender Series ★ 6.3 The Amazing Spider-Man 1978
★ 6.2 Heroes 1977
Mr. Munro ★ 7.6 Opening Night 1977
Bobby ★ 6.1 Nickelodeon 1976
Kathleen's Director ★ 7 The Killing of a Chinese Bookie 1976
Taxi Driver Series ★ 7.5 Quincy, M.E. 1976
Joe Ives ★ 5.9 Capone 1975
N.Y. Police Lt. ★ 7.8 A Woman Under the Influence 1974
Clancy ★ 6.1 Play It as It Lays 1972
Frank Series ★ 8.4 Banacek 1972
Lt. Hallohan Series ★ 8.1 Columbo 1971
Guard Series ★ 7.2 McCloud 1970
Doorman 
