- The Secret Garden: The Musical
2021 Ben Weatherstaff
- The Dead Hands of Dublin
2020 Narrator (voice)
- The Last Right
2019 Padraig
- Prisoners of the Moon
2019 Arthur Rudolph
- Mary Poppins Returns
2018 Binnacle
- The Boy
2016 Mr. Heelshire
- National Theatre Live: Hamlet
2015 Polonius
- Jimmy's Hall
2014 Father Sheridan
- National Theatre Live: Of Mice and Men
2014 Candy
- Homemade
2013 Tommy
- Extremely Loud & Incredibly Close
2011 Old Mr. Black
- Water for Elephants
2011 Camel
- The Eclipse
2009 Malachy
- Uncle Bill's Barrel
2008 Older Michael
- The Boy in the Striped Pyjamas
2008 Herr Liszt
- Stan
2006 Stan Laurel
- Driving Lessons
2006 Mr. Fincham
- Oyster Farmer
2004 Mumbles
- Conspiracy of Silence
2003 Bishop Quinn
- Harry Potter and the Chamber of Secrets
2002 Mr Mason
- Boxed
2002 Father Moran
- The Hound of the Baskervilles
2002 Coroner
- On the Nose
2001 Patrick Cassidy
- Rough for Theatre II
2000 A
- Aladdin and the Adventure of All Time
2000 (voice)
- Mad About Mambo
2000
- Sunset Heights
1999 Sam Magee, The Preacher
- A Love Divided
1999
- American History X
1998 Randy
- Memoirs of an Invisible Man
1992 Dr. Bernard Wachs
- Midnight's Child
1992 Dr. Stefan Grossbart
- Into the West
1992 Superintendant O'Mara
- Even Hitler Had a Girlfriend
1991 Marcus's Dad
- Hidden Agenda
1990 Brodie
- The Temptation of Eileen Hughes
1988 Bernard McAuley
- Home Cooking
1986 Gordon
- Sakharov
1984 Roy Medvedev
- Grass
1982 Arthur
- Cry of the Innocent
1980 Jasper Tooms
- Juno and the Paycock
1980 "Joxer" Daly
- Light
1979 Jack Parry
- A Question Of Faith
1979 Ilya
- The Legion Hall Bombing
1978 Detective Sergeant
- Waiting at the Field Gate
1975 Rainmarsh
- Screamer
1974 The Man
- Adolf Hitler: My Part in His Downfall
1973 Pongo
- The Death of Captain Doughty
1973 Francis Drake
- George
1972 Smedley
- Straw Dogs
1971 Chris Cawsey
- The Face of Fu Manchu
1965 Mathius
