Arnold Schwarzenegger Jericho Cane Gabriel Byrne The Man Robin Tunney Christine York Kevin Pollak Bobby Chicago CCH Pounder Detective Margie Francis Derrick O'Connor Thomas Aquinas David Weisenberg OB-GYN Rainer Judd Christine's Mother Miriam Margolyes Mabel Udo Kier Head Priest Luciano Miele Pope's Advisor Michael O'Hagan Cardinal Mark Margolis Pope Jack Shearer Kellogg Rod Steiger Father Kovak Eve Sigall Old Woman Victor Varnado Albino Robert Lesser Carson Gary Anthony Williams Utility Worker #2 John Nielsen Hospital Cop Elaine Corral Kendall Anchor Denice D. Lewis Emily Renee Olstead Amy Mo Gallini Monk #1 / Intruder Van Quattro Satan Priest Charles A. Tamburro Helicopter Pilot Walter von Huene Motorman Sven-Ole Thorsen Thug Sam Arnold Parishioner (Sam) (uncredited) Arnold Schwarzenegger Jericho Cane Gabriel Byrne The Man Robin Tunney Christine York Kevin Pollak Bobby Chicago CCH Pounder Detective Margie Francis Derrick O'Connor Thomas Aquinas David Weisenberg OB-GYN Rainer Judd Christine's Mother Miriam Margolyes Mabel Udo Kier Head Priest Luciano Miele Pope's Advisor Michael O'Hagan Cardinal Mark Margolis Pope Jack Shearer Kellogg Rod Steiger Father Kovak Eve Sigall Old Woman Victor Varnado Albino Robert Lesser Carson Gary Anthony Williams Utility Worker #2 John Nielsen Hospital Cop Elaine Corral Kendall Anchor Denice D. Lewis Emily Renee Olstead Amy Mo Gallini Monk #1 / Intruder Marc Lawrence Old Man Van Quattro Satan Priest Charles A. Tamburro Helicopter Pilot Linda Pine Head Priest Daughter David Franco Assistant Priest Steve Kramer Businessman Walter von Huene Motorman Sven-Ole Thorsen Thug Sam Arnold Parishioner (Sam) (uncredited) Arnold Schwarzenegger Jericho Cane Gabriel Byrne The Man Robin Tunney Christine York Kevin Pollak Bobby Chicago CCH Pounder Detective Margie Francis Derrick O'Connor Thomas Aquinas David Weisenberg OB-GYN Rainer Judd Christine's Mother Miriam Margolyes Mabel Udo Kier Head Priest Luciano Miele Pope's Advisor Michael O'Hagan Cardinal Mark Margolis Pope Jack Shearer Kellogg Rod Steiger Father Kovak Eve Sigall Old Woman Victor Varnado Albino Robert Lesser Carson Gary Anthony Williams Utility Worker #2 John Nielsen Hospital Cop Elaine Corral Kendall Anchor Denice D. Lewis Emily Renee Olstead Amy Mo Gallini Monk #1 / Intruder Marc Lawrence Old Man Van Quattro Satan Priest Charles A. Tamburro Helicopter Pilot Linda Pine Head Priest Daughter David Franco Assistant Priest Steve Kramer Businessman Walter von Huene Motorman Sven-Ole Thorsen Thug Sam Arnold Parishioner (Sam) (uncredited) Arnold Schwarzenegger Jericho Cane Gabriel Byrne The Man Robin Tunney Christine York Kevin Pollak Bobby Chicago CCH Pounder Detective Margie Francis Derrick O'Connor Thomas Aquinas David Weisenberg OB-GYN Rainer Judd Christine's Mother Miriam Margolyes Mabel Udo Kier Head Priest Luciano Miele Pope's Advisor Michael O'Hagan Cardinal Mark Margolis Pope Jack Shearer Kellogg Rod Steiger Father Kovak Eve Sigall Old Woman Victor Varnado Albino Robert Lesser Carson Gary Anthony Williams Utility Worker #2 John Nielsen Hospital Cop Elaine Corral Kendall Anchor Denice D. Lewis Emily Renee Olstead Amy Mo Gallini Monk #1 / Intruder Marc Lawrence Old Man Van Quattro Satan Priest Charles A. Tamburro Helicopter Pilot Linda Pine Head Priest Daughter David Franco Assistant Priest Steve Kramer Businessman Walter von Huene Motorman Sven-Ole Thorsen Thug Sam Arnold Parishioner (Sam) (uncredited)