Credits

• 2024 · A World War II Fairytale: The Making of Michael Mann's 'The Keep' as Himself
• 2021 · The Center Seat: 55 Years of Star Trek as Self
• 2019 · That Guy... Who Was In That Thing 3: Trek Stars as Self
• 2016 · Last Man Club as Will Hodges
• 2014 · The Librarians as Teddy Chislington
• 2013 · Free Birds as (voice)
• 2013 · April Apocalypse as Pops
• 2013 · The Devil's Dozen as
• 2012 · The Last Mark as Uncle Bill
• 2011 · Prep & Landing: Naughty vs. Nice as Big Guy (voice)
• 2011 · For Christ's Sake as Father Monahan
• 2010 · Prep & Landing Stocking Stuffer: Operation: Secret Santa as Big Guy (voice)
• 2010 · Farewell Mr. Kringle as Kris Kringle
• 2010 · Young Justice as Sardath (voice)
• 2010 · Mysterious Island as Captain Nemo
• 2010 · Meeting Spencer as Larry Lind
• 2009 · Prep & Landing as Big Guy (voice)
• 2009 · Star Trek as Vulcan Science Minister (uncredited)
• 2008 · Legend of the Seeker as The Keeper (voice)
• 2008 · Over Her Dead Body as Father Marks
• 2007 · Along the Way as Mr. Hereck
• 2007 · Mad Men as Robert Pryce
• 2007 · Transformers as Captain Witwicky
• 2006 · The Prestige as Merrit
• 2006 · Love's Abiding Joy as Scottie
• 2006 · Dexter as
• 2005 · Love's Long Journey as Scottie
• 2005 · Criminal Minds as John Caulfield
• 2005 · It's Always Sunny in Philadelphia as Father Cullen
• 2005 · Doctor Who as Canton Delaware
• 2005 · Doctor Who as Old Canton Delaware
• 2003 · Atlantis: Milo's Return as Erik Hellstrom (voice)
• 2003 · Gods and Generals as Gen. Isaac Trimble
• 2003 · Small Town Conspiracy as Taylor
• 2001 · Justice League as Merlin (voice)
• 2001 · Crossing Jordan as Clive Alpert
• 2000 · Gilmore Girls as Town Elder
• 1999 · The Hungry Bachelors Club as Mr. Ringold
• 1998 · Charmed as Merrill
• 1998 · The Wild Thornberrys as Lead Jackal (voice)
• 1998 · Pocahontas II: Journey to a New World as Additional Voice Talents (voice)
• 1998 · The Escape as Long
• 1998 · Goldrush: A Real Life Alaskan Adventure as Whiskers
• 1996 · The Lottery as Mayor Warner
• 1996 · Sometimes They Come Back... Again as Father Archer Roberts
• 1996 · Poltergeist: The Legacy as Grave Digger
• 1995 · JAG as Maj. Viktor Lushov
• 1995 · Star Trek: Voyager as Qatai
• 1994 · Following Her Heart as Father
• 1994 · Good King Wenceslas as Tomas
• 1994 · Gargoyles as Petros Xanatos (voice)
• 1994 · Iron Man as Dum Dum Dugan (voice)
• 1994 · Babylon 5 as The Soul Hunter
• 1994 · Babylon 5 as Warleader G'Sten
• 1993 · Diagnosis: Murder as Dr. Tom Arneberg
• 1993 · Gettysburg as Maj. Gen. Isaac R. Trimble / Narrator
• 1993 · Biker Mice from Mars as Lawrence Limburger (voice)
• 1993 · Frasier as Mr. Drake
• 1993 · seaQuest DSV as The Professor
• 1993 · Needful Things as Father Meehan
• 1991 · Star Trek VI: The Undiscovered Country as Klingon Commander
• 1990 · Wild at Heart as Mr. Reindeer
• 1989 · Quantum Leap as Gooshie, the Miner
• 1988 · Lucky Stiff as Pa
• 1988 · Elvira: Mistress of the Dark as Vincent Talbot
• 1987 · Star Trek: The Next Generation as Dr. Ira Graves
• 1987 · Gunsmoke: Return to Dodge as Digger McCloud
• 1987 · The Max Headroom Show as Blank Reg
• 1986 · Designing Women as
• 1986 · Theban Plays: Oedipus at Colonus as Chorus
• 1985 · The Doctor and the Devils as Landlord
• 1985 · MacGyver as Dr. Zito
• 1985 · Max Headroom: 20 Minutes into the Future as Blank Reg
• 1985 · A.D. as Gracchus 1 episode, 1985
• 1984 · Paint Me a Murder as Mahaffy
• 1984 · Murder, She Wrote as Dr. Fredrick Grundberg
• 1984 · Hammer House of Mystery and Suspense as Mahaffy
• 1984 · The Zany Adventures of Robin Hood as Saxon Thief
• 1984 · Lassiter as Sweeny
• 1983 · The Keep as Alexandru
• 1982 · Nutcracker as George Peacock
• 1981 · The Day of the Triffids as Bill's Father
• 1980 · Carpathian Eagle as Hospital Gardener
• 1980 · The Elephant Man as Man in Pub
• 1980 · Shōgun as Specz
• 1980 · Hammer House of Horror as Hospital Gardener
• 1980 · Hawk the Slayer as Ranulf
• 1980 · The Sea Wolves as 'Patch' Lovecroft
• 1980 · Keep Smiling as Harry Cowper
• 1979 · Minder as John
• 1979 · The Legend of King Arthur as Gorlois
• 1978 · The Nativity as Flavius
• 1978 · Out as Mr. Smith
• 1978 · Enemy at the Door as Raymond Girard
• 1977 · The Professionals as Malenski
• 1977 · The Duellists as Fencing Master
• 1975 · Antony and Cleopatra as Scarus
• 1975 · The Sweeney as Det. Chief Insp. Morrison
• 1970 · Play for Today as Harry Cowper
• 1968 · Tell Me Lies as
• 1967 · Marat/Sade as A Mad Animal
• 1962 · Strongroom as Alec (as Morgan Sheppard)