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.
Columbo
Series • 1971
ER
Series • 1994
Murder, She Wrote
Series • 1984
Quincy, M.E.
Series • 1976
Matlock
Series • 1986
Beyond Belief: Fact or Fiction
Series • 1997
McCloud
Series • 1970
Rich Man, Poor Man - Book II
Banacek
Series • 1972
Last Action Hero
Movie • 1993
Mars Attacks!
Movie • 1996
JFK
Movie • 1991
An American Tail
Movie • 1986
The Amazing Spider-Man
Series • 1978
The Natural
Movie • 1984
Vegas Vacation
Movie • 1997
A Woman Under the Influence
Movie • 1974
Opening Night
Movie • 1977
The Killing of a Chinese Bookie
Movie • 1976
The Journey of Natty Gann
Movie • 1985
The In-Laws
Movie • 1979
Come See the Paradise
Movie • 1990
Capone
Movie • 1975
The Last of the Finest
Gloria
Movie • 1980
Love Streams
Nickelodeon
Little Miss Marker
Heroes
Big Man on Campus
Movie • 1989