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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.
Mars Attacks!1996
Last Action Hero1993
JFK1991
An American Tail1986
ER1994
Columbo1971
Vegas Vacation1997
The Natural1984