Actor | Producer
John Patrick Mahon (February 2, 1938 - May 3, 2020) was an American film, stage and television actor. He was known f...
The People Under the Stairs
... 1991
The Exorcist
... 1973
Zodiac
... 2007
Armageddon
... 1998
John Patrick Mahon (February 2, 1938 - May 3, 2020) was an American film, stage and television actor. He was known for Armageddon (1998), L.A. Confidential (1997) and Zodiac (2007).
Blood Is Blood
... 2016
A Shot in the Dark
... 1964
Real Steel
... 2011
Maniac
... 2012
Megan Is Missing
... 2011
He Got Game
... 1998
Insidious: The Last Key
... 2018
Arcadian
... 2024
Breathe
... 2014