John Billingsley
- Degree of Certainty
2026 Mr. Williams
- Anaconda
2025 Jerry
- Skincare
2024 Jeff
- Manhunt
2024 Judge Joseph Holt
- Grotesquerie
2024 Dr. John Lehman
- Matlock
2024 Robert Walton
- The Shift
2023 Russo
- Boy Makes Girl
2023 Chunky
- Based on a True Story
2023 Wendy Jenkins' Boss
- Emily the Criminal
2022 Office Manager
- Pam & Tommy
2022 Bruce Hendricks
- NCIS: Hawaiʻi
2021 Professor Staggs
- Unbelievable!!!!!
2020 Male Curlisha
- NEXT
2020 Dr. Bernard Weiss
- The Circuit
2019
- All Rise
2019 Timothy Gipson
- Unbelievable
2019 Judge Brent Gordon
- The Rookie
2018 Kevin Scott
- The Conners
2018 Mr. Swindell
- Station 19
2018 Lloyd
- The Resident
2018 Dr. Stewart
- Homecoming
2018 Buddy
- The Last Word
2017 Father Reilly
- The Man from Earth: Holocene
2017 Harry
- The Good Doctor
2017 Kurt
- The Orville
2017 Cambis Borrin
- Madtown
2016 Lloyd Zane Miller
- 20th Century Women
2016 Abbie's ObGyn
- Trekoff: The Motion Picture
2016 Himself
- The Watcher
2016 Dr. Klein
- This Is Us
2016 Bill Weston
- Lucifer
2016 Alvin Kapitski
- Stitchers
2015 Mitchell Blair
- Rosewood
2015 West Waters
- Man Seeking Woman
2015 Watson
- Con Man
2015 Gordon
- Star Trek: Enterprise - In a Mirror, Darkly
2014 Dr. Phlox
- Star Trek: Enterprise - Storm Front
2014 Dr. Phlox
- Intelligence
2014 Dr. William Crispin
- Chasing Life
2014 Edwin Shaw
- Extant
2014 Dr.Mize
- Red Line
2013 Sam
- Star Trek: Enterprise - Shockwave
2013 Dr. Phlox
- The Bridge
2013 Mr. DeLarge
- Masters of Sex
2013 Dr. Lloyd Madden
- Trade of Innocents
2012 Malcolm Eddery
- The Silent Thief
2012 Bum
- Sironia
2011 Doug
- The Least of These
2011 Father Alfred McKavee
- Suits
2011 Stan Jacobson
- Revenge
2011 Roger Halsted
- Harry's Law
2011 Norman Miller
- Shameless
2011 Dr. Drew
- Scooby-Doo! Mystery Incorporated
2010 Dr. Henklefust (voice)
- Nikita
2010 Heidecker
- Hawaii Five-0
2010 Eugene Goodman
- 2012
2009 Professor West
- The Pool Boys
2009 Prof. James Kellogg
- Castle
2009 Harvey Larson
- The Good Wife
2009 Dean Randolph
- NCIS: Los Angeles
2009 Doug Ouellet
- AM1200
2008 Jonah Henry
- The Last Word
2008 Brady
- S.I.S.
2008 Ira Grossman
- Community
2008 Phil
- Eli Stone
2008 Daniel Foote
- Fear Itself
2008 Phil
- True Blood
2008 Mike Spencer
- The Mentalist
2008 Ellis Mars
- Leverage
2008 Coswell
- The Man from Earth
2007 Harry
- Ripple Effect
2007 Brad
- Journeyman
2007
- Room 6
2006 Harrison McKendrick
- Dead and Deader
2006 Langdon
- The Nine
2006 Egan Foote
- The 12 Dogs of Christmas
2005 Dogcatcher Doyle
- Ghost Whisperer
2005 Mike
- Criminal Minds
2005 Hugh Rollins
- Bones
2005 Dr. Edward Harkness
- Grey's Anatomy
2005 Jacob Nolston
- Prison Break
2005 Terrence Steadman
- The Closer
2005 Tom Newman
- A Cinderella Story
2004 Mr. Rothman
- Trekkies 2
2004 Himself
- CSI: NY
2004 Cecil Arthur
- Out of Time
2003 Chae
- Lessons for an Assassin
2003 Mr. Jensen
- Cold Case
2003 George Marks (2005)
- Nip/Tuck
2003 Ben White
- NCIS
2003 Jackson Scott
- White Oleander
2002 Paramedic
- High Crimes
2002 Lie Detector Coach
- Without a Trace
2002 Harry
- Breathing Hard
2001 Hammond
- Just Ask My Children
2001 Andrew Gindes
- The Glass House
2001 Driving Instructor
- Crocodile Dundee in Los Angeles
2001 Barry
- Six Feet Under
2001 Boring Man
- Star Trek: Enterprise
2001 Phlox
- 24
2001 Michael Latham
- Scrubs
2001 Alan
- Blood on the Backlot
2000 John Waddington
- CSI: Crime Scene Investigation
2000 Paul Cydon
- The Others
2000 Prof. Miles Ballard
- The Huntress
2000
- Gilmore Girls
2000 Mr. Remmy
- FreakyLinks
2000
- Countdown: The Sky's on Fire
1999 Dr. Andrew Pike
- Jimmy Zip
1999 Irate Driver
- Kate's Addiction
1999 FBI Agent #1
- Judging Amy
1999 Bebe's Attorney
- Angel
1999 Dr. Royce
- Roswell
1999
- Family Law
1999 Edward Duke
- The West Wing
1999 Dr. John Fallow
- Jack & Jill
1999 Barto's Doctor
- Eden
1998 Lee
- Felicity
1998 Delivery Guy
- L.A. Doctors
1998 Mr. Snow
- Martial Law
1998 Inspector Hotchkiss
- Eat Your Heart Out
1997 Technician
- Stargate SG-1
1997 Simon Coombs
- Beyond Belief: Fact or Fiction
1997 Simms (segment "The Wall")
- The Practice
1997 Robert Schmidt
- The Pretender
1996 Kenny
- Profiler
1996 Clifford
- Arli$$
1996 Headmaster
- Touched by an Angel
1994 Peter Garfield
- The X-Files
1993 Timothy 'Timmy the Geek' Landau
- Diagnosis: Murder
1993 Eddie Dagabosian
- Adventures in Spying
1992 Officer Jenkins
- Shredder Orpheus
1990 Linus
- Twin Peaks
1990 Doctor Ben
- Northern Exposure
1990 Patient
- Flint
Sulphur John
