- Carousel
2026 Sam
- Line of Fire
2026 Thomas Barnes
- The Six Triple Eight
2024 Franklin Delano Roosevelt
- The Dropout
2022 George Shultz
- The Man in the Woods
2020 Headmaster Waldorf
- On the Basis of Sex
2018 Erwin Griswold
- The Mayo Clinic
2018 Charlie Mayo (voice)
- Monkey Business: The Adventures of Curious George's Creators
2017 Narrator (voice)
- Dateline: Saigon
2017 Narrator (voice)
- Godless
2017 Marshall John Cook
- Anesthesia
2016 Prof. Walter Zarrow
- Miss Sloane
2016 George Dupont
- Please Be Normal
2015 Dad
- Dean Smith
2015 Narrator
- And It Was Good
2015 Judge Alexander Baas / Doctor / Gravedigger
- Grace and Frankie
2015 Sol Bergstein
- Jo
2013
- The Newsroom
2012 Charlie Skinner
- Prohibition
2011 Reader (voice)
- The Best of The Tony Awards: The Plays
2006 John Honeyman (segment "A Walk in the Woods")
- Law & Order: Trial by Jury
2005 Jack McCoy
- Le Divorce
2003 Chester Walker
- The Commission
2003 J. Lee Rankin
- The Matthew Shepard Story
2002 Dennis Shepard
- A House Divided
2000 David Dickson
- The Unfinished Journey
1999 Narrator (voice)
- Here Am I, Send Me: The Story of Jonathan Daniels
1999 Narrator
- Family Guy
1999 Bruce Kaplan (voice)
- Law & Order: Special Victims Unit
1999 Jack McCoy
- Miracle at Midnight
1998 Dr. Karl Koster
- Exiled
1998 Jack McCoy
- Shadow Conspiracy
1997 The President
- Thomas Jefferson
1997 Thomas Jefferson (voice)
- Lewis & Clark - The Journey of the Corps of Discovery
1997 Thomas Jefferson (voice)
- The Proprietor
1996 Harry Bancroft
- The Journey of August King
1995 Producer
- Nixon
1995 Richard Helms
- Amazing Stories: The Movie IV
1995 Jordan Manmouth (archive footage)
- Time Life's Lost Civilizations
1995 Narrator
- Serial Mom
1994 Eugene Sutphin
- The Enemy Within
1994 President William Foster
- David's Mother
1994 John Nils
- Assault at West Point: The Court-Martial of Johnson Whittaker
1994 Daniel Chamberlain
- Tennessee Williams: Orpheus of the American Stage
1994 Tom Wingfield (archive footage)
- I'll Fly Away: Then and Now
1993 Forrest Bedford
- Homicide: Life on the Street
1993 Jack McCoy
- Earth and the American Dream
1992 Reader (voice)
- HBO First Look
1992
- The Man in the Moon
1991 Matthew Trant
- Mindwalk
1991 Jack Edwards
- I'll Fly Away
1991 Forrest Bedford
- A Captive in the Land
1990 Royce
- Law & Order
1990 Jack McCoy
- The Civil War
1990 Abraham Lincoln (voice)
- Crimes and Misdemeanors
1989 Ben
- Welcome Home
1989 Woody
- Lantern Hill
1989 Andrew Stuart
- Tales from the Crypt
1989 G.G. Devoe (segment "As Ye Sow")
- The Nightmare Years
1989 Bill Shirer
- Terrorist on Trial: The United States vs. Salim Ajami
1988 Jim Delmore
- A Walk in the Woods
1988 John Honeyman
- Lincoln
1988 Abraham Lincoln
- September
1987 Peter
- Swimming to Cambodia
1987 Additional Cast from 'The Killing Fields' (archive footage)
- The Room Upstairs
1987 Travis Coles
- Devil's Paradise
1987 Jones
- Hannah and Her Sisters
1986 David (uncredited)
- The Fifth Missile
1986 Capt. Allard Renslow
- Flagrant désir
1986 Inspecteur Gerry Morrison
- Just Between Friends
1986 Harry Crandall
- Warning Sign
1985 Cal Morse
- Love Lives On
1985 Bernie
- Finnegan Begin Again
1985 Paul Broadbent
- Amazing Stories
1985 Jordan Manmouth
- The Killing Fields
1984 Sydney Schanberg
- The Boy Who Loved Trolls
1984 Ofoeti
- Dempsey
1983 Doc Kearns
- In Defense of Kids
1983 Paul Wilcox
- Games Mother Never Taught You
1982 David Bentells
- Q.E.D.
1982 Professor Quentin Everett Deverill
- American Playhouse
1982 Robert Oppenheimer
- Heaven's Gate
1980 Frank Canton
- Hopscotch
1980 Jack Cutter
- Sweet William
1980 William McClusky
- Friendly Fire
1980 C.D.B. Bryan
- Oppenheimer
1980 Robert Oppenheimer
- Eagle's Wing
1979 White Bull
- Interiors
1978 Mike
- Capricorn One
1977 Lt. Col. Peter Willis
- Sweet Revenge
1976 Le Clerq
- Rancho Deluxe
1975 Cecil Colson
- Journey into Fear
1975 Mr. Graham
- The Great Gatsby
1974 Nick Carraway
- Reflections of Murder
1974 Michael Elliott
- The Glass Menagerie
1973 Tom
- Much Ado About Nothing
1973 Benedick
- Mahoney's Last Stand
1972 Felix
- Savages
1972 James, the Limping Man
- Who Killed Mary Whats'ername?
1971 Alex Monte
- Cover Me Babe
1970 Cameraman
- Generation
1969 Desmond
- Three
1969 Taylor
- Fitzwilly
1967 Oliver
- The Plastic Dome of Norma Jean
1966 Andy
- Dr. Kildare
1961 Mark
- Hallmark Hall of Fame
1951 Travis Coles
