Acting
- 2025The Better SisterClark5 ep.
- 2020FBI: Most WantedJackson Chase3 ep.
- 2019The Loudest VoiceJack Welch1 ep.
- 2019The Enemy WithinRichard Bregman1 ep.
- 2014An BronntanasSeán Óg5 ep.
- 2013Golden BoyEd McKenzie1 ep.
- 2010The Walking DeadEarl Sutton11 ep.
- 2010Blue BloodsDavid Cummings2 ep.
- 2003Cold CaseJohn Stillman156 ep.
- 2003NCISCharles T. Ellison3 ep.
- 2000The Fearing MindJack1 ep.
- 1999Seasons of LoveGorm Schrader2 ep.
- 1999Atomic TrainWally Phister2 ep.
- 1998Dawson's CreekSheriff John Witter4 ep.
- 1997Brooklyn SouthRay MacElwaine8 ep.
- 1996EZ StreetsCaptain Geary13 ep.
- 1996MillenniumWilliam Garry1 ep.
- 1995The ClientWaite Calhoun1 ep.
- 1994Chicago HopeTrevor Filburn3 ep.
- 1993seaQuest DSVColonel Schrader1 ep.
- 1993The X-FilesMichael Kritschgau5 ep.
- 1989Quantum LeapAdmiral Spencer1 ep.
- 1987Leg WorkClauson1 ep.
- 1982Fame1 ep.
- 1981The Fall Guy1 ep.
- 1977The Incredible Hulk1 ep.
Behind the camera
- 2003Cold CaseDirector156 ep.
Guest appearances
- 2025The Better SisterClark5 ep.
- 2024FBI: Most WantedJackson Chase3 ep.
- 2012Blue BloodsDavid Cummings, Fire Marshal Chieco2 ep.
- 2018The Walking DeadEarl Sutton11 ep.
- 2019The CrownArthur 'Bull' Hancock1 ep.
- 2019The Loudest VoiceJack Welch1 ep.
- 2019The Enemy WithinRichard Bregman1 ep.
- 2011NCISCharles T. Ellison3 ep.
- 2016The Good WifeOren Cleary1 ep.
- 2016ElementaryNeil Dannon1 ep.
- 2014Madam SecretaryAllen Bollings1 ep.
- 2013Golden BoyEd McKenzie1 ep.
- 2012HomelandRex Henning1 ep.
- 2012SuitsLawrence Kemp1 ep.
- 1999Dawson's CreekSheriff John Witter4 ep.
- 2002Without a TraceAbner Harrington1 ep.
- 2001HeartbeatZaikov1 ep.
- 2000The Fearing MindJack1 ep.
- 2000The PracticeHenry Doaks2 ep.
- 1997The X-FilesMichael Kritschgau5 ep.
- 1998Brooklyn SouthRay MacElwaine8 ep.
- 1997MillenniumWilliam Garry1 ep.
- 1996Nash BridgesFBI Special Agent Elliot Rose1 ep.
- 1996JAGMajor Klein1 ep.
- 1994Chicago HopeTrevor Filburn3 ep.
- 1995The ClientWaite Calhoun1 ep.
- 1994seaQuest DSVColonel Schrader1 ep.
- 1993FrasierTim1 ep.
- 1992CheersMitch Ganzell1 ep.
- 1992MatlockSheriff Dewey2 ep.
- 1992Quantum LeapAdmiral Spencer1 ep.
- 1990Law & OrderFreddo Parisi1 ep.
- 1988Miami ViceCharles Hatch1 ep.
- 1987Leg WorkClauson1 ep.
- 1982Fame1 ep.
- 1982The Fall Guy1 ep.
- 1981The Incredible Hulk1 ep.
Also known as: John Joseph Harris · John Joseph Finn · John J. Finn · جان فین