Films[]
- 1968 – Hour of the Wolf as Johan Borg
- 1971 – The Night Visitor as Salem
- 1973 – The Exorcist as Father Lankester Merrin
- 1977 – Exorcist II: The Heretic as Father Lankester Merrin
- 1980 – Death Watch as Gerald Mortenhoe
- 1989 – Ghostbusters II as Vigo the Carpathian (voice)
- 1993 – Needful Things as Leland Gaunt
- 2001 – Sleepless as Ulisse Moretti
- 2001 – Inacto as Samuel
- 2010 – The Wolfman as Passenger on train
Video Games[]
- 2009 – Ghostbusters: The Video Game as Vigo the Carpathian (voice)