Credits

• 2021 · The Unforgivable as Michael Malcolm
• 2021 · Pennywise: The Story of ‘It’ as Himself
• 2020 · The Comey Rule as Chuck Rosenberg
• 2017 · Ozark as Nathan Davis
• 2016 · Conviction as Earl Slavitt
• 2016 · Billions as Sanford Bensinger
• 2016 · Anesthesia as Mr. Werth
• 2014 · NCIS: New Orleans as Ezra Van Cleef
• 2014 · Chicago P.D. as Adam Ames
• 2013 · The Blacklist as David Foy
• 2013 · The Americans as Frank Gaad
• 2012 · Elementary as Mitch Barrett
• 2010 · Blue Bloods as Richard Walters
• 2010 · Rizzoli & Isles as Prof. Dwayne Kravitz
• 2009 · White Collar as William Wolcott
• 2009 · The Good Wife as Ed Pratt
• 2009 · Taking Woodstock as Don
• 2008 · The Lazarus Project as Cop #2
• 2006 · Nightmares & Dreamscapes: From the Stories of Stephen King as Howard Cottrell
• 2004 · The Tony Danza Show as Self - Guest
• 2004 · Century City as
• 2002 · Just Cause as
• 2000 · Wonder Boys as Walter Gaskell
• 1999 · Law & Order: Special Victims Unit as Nat Randolph
• 1999 · Law & Order: Special Victims Unit as Daniel Varney
• 1998 · It's a Miracle as
• 1998 · The Adventures of Swiss Family Robinson as David Robinson
• 1997 · The Practice as Walter 'The Hummer' Arens
• 1996 · Promised Land as Joe Greene
• 1995 · The Invaders as Jerry Thayer
• 1995 · The Invaders as Jerry Thayer
• 1995 · The Outer Limits as Dr. Stephen Ledbetter
• 1994 · Touched by an Angel as Joe Greene
• 1993 · Dave's World as Richard Thomas
• 1992 · Lincoln as John Hay (voice)
• 1990 · It as Bill Denbrough
• 1990 · Law & Order as Roger Jenkins
• 1989 · Glory! Glory! as Rev. Bobby Joe
• 1989 · Tales from the Crypt as Dr. Trask
• 1988 · American Experience as Narrator (voice)
• 1985 · Final Jeopardy as Marty Campbell
• 1985 · Night of 100 Stars II as Self
• 1982 · Johnny Belinda as William Richmond
• 1982 · Nature as Narrator (voice)
• 1982 · American Playhouse as Cal Porter
• 1980 · Battle Beyond the Stars as Shad
• 1979 · All Quiet on the Western Front as Paul Bäumer
• 1979 · Roots: The Next Generations as Jim Warner
• 1974 · Dinah! as Self
• 1973 · The American Film Institute Salute to ... as Self
• 1972 · The Waltons as John Walton Jr.
• 1970 · Night Gallery as Ian Evans
• 1969 · Marcus Welby, M.D. as Dennis Alan Graham
• 1969 · Winning as Charley
• 1965 · The F.B.I. as John 'Chill' Chilton
• 1962 · The Tonight Show Starring Johnny Carson as Self
• 1961 · The Mike Douglas Show as Self - Co-Host
• 1961 · The Mike Douglas Show as Self
• 1959 · Bonanza as Billy
• 1951 · Hallmark Hall of Fame as Joey
• 1951 · Hallmark Hall of Fame as Paul Baumer
• 1951 · Hallmark Hall of Fame as Henry Durie
• 1951 · Hallmark Hall of Fame as Ivor
• 1951 · Hallmark Hall of Fame as The Boy
• 1944 · Golden Globe Awards as Self - Presenter
• Future · Broadway: The Next Generation as Self
• 2022 · A Waltons Thanksgiving as Self - Narrator (voice)
• 2021 · The Waltons' Homecoming as Self - Narrator
• 2021 · Christmas vs The Walters as Roger
• 2020 · Christmas Day in the Morning as Self
• 2018 · The Price for Silence as Richard Davenport
• 2018 · Every Act of Life as Self
• 2011 · Time After Time as
• 2008 · Beyond a Reasonable Doubt: Making '12 Angry Men' as Self
• 2006 · Wild Hearts as Bob
• 2006 · Sweet Tornado: Margo Jones and the American Theater as Tennessee Williams
• 2005 · Sacred Stage: The Mariinsky Theater as Self - Narrator
• 2005 · Annie's Point as Richard Eason
• 2002 · Anna's Dream as Rod Morgan
• 2002 · Beyond the Prairie, Part 2: The True Story of Laura Ingalls Wilder Continues as Charles Ingalls
• 2001 · The Miracle of the Cards as Dr. Neal Kassell
• 2000 · The Christmas Secret as Jerry McNeil
• 2000 · In the Name of the People as Jack Murphy
• 2000 · The Million Dollar Kid as Ted Hunter
• 1999 · Beyond the Prairie: The True Story of Laura Ingalls Wilder as Charles Ingalls
• 1998 · Big and Hairy as Victor Dewlap
• 1997 · A Thousand Men and a Baby as Dr. Hugh Bud Keenan
• 1997 · Flood: A River's Rampage as Herb Dellenbach
• 1997 · A Walton Easter as John-Boy Walton
• 1997 · Riding the Rails as Narrator
• 1996 · Timepiece as Richard Evans
• 1996 · What Love Sees as Gordon Holly
• 1995 · The Christmas Box as Richard Evans
• 1995 · Down, Out and Dangerous as Tim Willows
• 1995 · A Walton Wedding as John-Boy Walton
• 1995 · Death in Small Doses as Richard Lyon
• 1994 · To Save the Children as David Young
• 1993 · A Walton Thanksgiving Reunion as John-Boy Walton
• 1993 · Linda as Paul Cowley
• 1993 · Precious Victims as Don Weber
• 1993 · I Can Make You Love Me as Richard Farley
• 1992 · Crash Landing: The Rescue of Flight 232 as Gary Brown
• 1991 · Yes Virginia, There Is a Santa Claus as James O'Hanlan
• 1991 · Mission of the Shark: The Saga of the U.S.S. Indianapolis as Lieutenant Steven Scott
• 1990 · Common Ground as Colin Diver
• 1990 · Andre's Mother as Cal
• 1990 · The Easter Story as Mark (voice)
• 1988 · Go Toward the Light as Greg Madison
• 1983 · Hobson's Choice as Will Mossup
• 1983 · Living Proof: The Hank Williams Jr. Story as Hank Williams, Jr.
• 1982 · Fifth of July as Kenneth Talley Jr.
• 1982 · Barefoot In the Park as Paul Bratter
• 1981 · Berlin Tunnel 21 as Sandy Mueller
• 1980 · To Find My Son as David Benjamin
• 1979 · No Other Love as Andrew Madison
• 1978 · Getting Married as Michael Carboni
• 1977 · September 30, 1955 as Jimmy J.
• 1975 · The Silence as Cadet James Pelosi
• 1974 · The Red Badge of Courage as Pvt. Henry Fleming
• 1972 · You'll Like My Mother as Kenny
• 1971 · The Homecoming: A Christmas Story as John-Boy Walton
• 1971 · Cactus in the Snow as Harley MacIntosh
• 1971 · The Todd Killings as Billy Roy
• 1971 · Red Sky at Morning as Joshua Arnold
• 1969 · Last Summer as Peter
• 1961 · 1, 2, 3 Go as Himself
• 1961 · Give Us Barabbas! as Junge
• 1959 · A Doll's House as Ivor
• 1958 · The Christmas Tree as Joey