Filmography
| Year | Title | Role |
| 2014 | Infinitely Polar Bear | Murray Stuart |
| 2013 | Isn't It Delicious | Bill Weldon |
| 2008 | The Accidental Husband | Mr. Bollenbecker |
| 2006 | The Good Shepherd | Sen. John Russell, Sr. |
| 2000 | Audrey Hepburn Retrospective | Joseph Hepburn |
| 1984 | 2010 | Dave Bowman |
| 1978 | Because He's My Friend | Eric |
| 1974 | Paul Sharits and Paul Glabicki | Garry |
| 1974 | Black Christmas (1974) | Peter Smythe |
| 1973 | Paperback Hero | Rick Dylan |
| 1972 | The Man Who Would Be Fred | Dr. Stevens |
| 1970 | Black Water Gold | Christofer Perdeger |
| 1969 | De Sade | Louis Alphonse Donatien, Marquis de Sade |
| 1968 | 2001: A Space Odyssey | Dr. Dave Bowman |
| 1966 | Madame X | Clayton Anderson Jr. |
| 1965 | Bunny Lake Is Missing | Steven Lake |
| 1962 | David and Lisa | David Clemens |
| 1961 | The Hoodlum Priest / Bus Stop | Billy Lee Jackson |
