(1991) The Fisher King

as TV Executive

(2007) Reign Over Me

as Nigel Pennington

(1993) Fearless

as Jeff Gordon

(1998) The Lost World

as Lord John Roxton

(2004) Darklight

as Faith Director Chapel

(1978) The Bastard

as Lt. Stark

(2008) Pathology

as Dr. Quentin Morris

(1996) Multiplicity

as Ted

(1989) Get Smart, Again!

as Maj. Waterhouse

(1994) Schemes

as Arthur Martin

(1993) Arcade

as Difford

(2000) Woman on Top

as Alex Reeves

(1994) Without Warning

as Barry Steinbrenner

(1978) The Lazarus Syndrome

as EKG Doctor (uncredited)

(2000) Gen¹³

as Colonel John 'Jack' Lynch (voice)

(2018) Buttons

as Dr. Johnson

(2004) The Eavesdropper

as Dr. Gene Kramer

(1995) Evolver

as Russell Bennett

(2023) Star Trek: Picard - The IMAX Live Series Finale Event

as Q (uncredited)

(1997) Final Descent

as Capt. George W. Bouchard

(1994) Journey's End - The Saga of Star Trek: The Next Generation

as Self

(1994) Deep Red

as Thomas Newmeyer

(2012) Zombie Hamlet

as Jerry

(2012) CLONED: The Recreator Chronicles

as Dr. Frank Miller

(1980) Loving Couples

as Allan

(1979) The Onion Field

as LAPD Lieutenant

(2012) Bronies: The Extremely Unexpected Adult Fans of My Little Pony

as Himself

(1975) Legacy

as ---

(1977) SST: Death Flight

as Bob Connors

(2018) Resurrect

as Warren

(2024) To the Journey - Looking Back at Star Trek: Voyager

as Self

(2019) Manipulated

as ---

(1987) On Fire

as Bobby Holicker

(2008) My Apocalypse

as Nathan Eastman

(1992) Missing Pieces

as Paul / Walter Thackary

(2014) Chaos on the Bridge

as Self

(2015) Visions

as Victor Napoli

(2011) The Captains

as Self

(1990) Angel of Death

as Jeffrey

(2009) Crank: High Voltage

as Fish Halman

(2015) Hypnotized

as ---

(1990) Taking Care of Business

as Ted Bradford Jr.

(1999) Final Run

as George Bouchard

(1981) The Miracle of Kathy Miller

as Dr. Christensen

(2016) 50 Years of Star Trek

as Self

(1990) Bad Influence

as Howard

(1998) You Lucky Dog

as Lyle Windsor

(1996) Raven Hawk

as Stansfield

(2017) Olaf's Frozen Adventure

as Mr. Olsen (voice)

(2002) Return to Area 51

as Narrator

(1999) Border Line

as Rolf Berger

(2003) Burl's

as Mr Cooper

(1992) The Hand that Rocks the Cradle

as Dr. Victor Mott

(2018) The Late Batsby

as Victor Freeze/Mr. Freeze (voice)

(2019) When the Train Stops

as Jason Booth

(2017) Remembering Leonard: His Life, Legacy and Battle with COPD

as Himself

(2009) Gamer

as Chief Of Staff

(1991) Star Trek: 25th Anniversary Special

as Self

(2001) Good Advice

as Ted

(1997) Trekkies

as Self

(2002) The Big Time

as Vaughn Clay

(2020) Ayreon: Electric Castle Live And Other Tales

as Narrator

(1980) Nightside

as Willy Potts

(2018) My Little Pony: Best Gift Ever

as Discord

(2014) My Little Pony Friendship is Magic: Keys of Friendship

as Discord

(1977) The Man With the Power

as Clark

(1994) Star Trek: The Next Generation - All Good Things...

as Q

(2024) IDENTITEAZE

as Steve

(1994) Duckman

as ---

(2008) Breaking Bad

as Donald Margolis

(2006) Shark

as ---

(1987) Star Trek: The Next Generation

as Q

(2005) The Closer

as Dr. Dawson

(1996) The Real Adventures of Jonny Quest

as Dr. Benton Quest (voice)

(2007) Greek

as Himself

(2001) The Guardian

as ---

(2001) The Division

as ---

(1999) Judging Amy

as Dr. Eagan

(1995) Star Trek: Voyager

as Q

(1995) Legend

as Janos Bartok

(1985) The Twilight Zone

as (segment "Dead Run")

(2006) The Unit

as ---

(1998) Charmed

as Odin

(1998) Sports Night

as ---

(2002) Without a Trace

as Brian Gaghan

(1985) MacGyver

as Brian Ashford

(2000) Andromeda

as Uncle Sid Barry / Sam Profitt

(1997) The Angry Beavers

as ---

(1997) The Practice

as Walter Bannish

(1997) Stargate SG-1

as Frank Simmons

(2001) Special Unit 2

as King of the Links

(1988) Mission: Impossible

as Drake

(1983) The Thorn Birds

as Alastair MacQueen

(1987) Star Trek: The Next Generation

as Self

(1988) Trial and Error

as ---

(1992) Batman: The Animated Series

as Eagleton (voice)

(2010) Young Justice

as Mr. Twister / Brom Stikk (voice)

(2010) My Little Pony: Friendship Is Magic

as Discord (voice)

(2011) The Secret Circle

as ---

(2020) Star Trek: Picard

as Q (uncredited)

(2000) CSI: Crime Scene Investigation

as Robert Lansdale

(2008) The Mentalist

as Edward Feinberg

(1999) The West Wing

as Al Kiefer

(2022) The Shuttlepod Show

as Self

(1995) The Outer Limits

as Donald Finley

(2021) The Center Seat: 55 Years of Star Trek

as Self

(2010) Law & Order: LA

as Avery Staynor

(2020) Star Trek: Picard

as Q

(2019) The Ready Room

as Self

(2021) DOTA: Dragon's Blood

as Ritterfau (voice)

(1974) The Six Million Dollar Man

as Medic

(1974) The Six Million Dollar Man

as Diver

(1974) The Six Million Dollar Man

as Sergeant Chapman

(1986) Matlock

as Dr. Albert Levinson

(2024) Masters of the Universe: Revolution

as Granamyr (voice)

(1977) Aspen

as Ray Chilton

(1995) Murder One

as Mitchell Garron, Esq.

(1993) Star Trek: Deep Space Nine

as Q

(1972) Le Grand Échiquier

as Self

(1972) Emergency!

as Dr. DeRoy

(2014) Bronies 2 - More Unexpected Fans of My Little Pony

as ---

(1986) L.A. Law

as Mark Chelios

(2006) Torchwood

as Allen Shapiro

(2013) The Captains Close Up

as Self

(1999) Family Guy

as Pewterschmidt Industries Executive (voice)

(1997) Fired Up

as Mr. Lux

(1978) Little Women

as Frank Vaughn

(1993) Dave's World

as Mr. McFadden

(1984) Murder, She Wrote

as Binky Holborn

(1994) Touched by an Angel

as Justinian Jones

(2020) Star Trek: Lower Decks

as Q (voice)

(2001) Crossing Jordan

as Thaxton

(1997) Working

as Kevin

(2014) The Librarians

as Sesselman

(2016) Justice League Action

as Brainiac (voice)

(1978) Battlestar Galactica

as Officer

(1997) Ally McBeal

as Jackson Poile

(1981) Nero Wolfe

as Tom Irwin

(2003) Duck Dodgers

as Sinestro (voice)