Acting
Mark O'Brien
Born 7 May 1984 in St. Johns, Newfoundland, Canada
81 credits
Mark O'Brien (born May 7th, 1984) is a Canadian actor and director. He is best known for playing the role of Des Courtney in Republic of Doyle (2010) and Tom Rendon in Halt and Catch Fire (2014).
Known for
Acting 56
- TBALittle OneFilm
- TBABetter PeopleFilmJohn
- TBANice PeopleFilm
- TBAGood in the RoomFilmCharlie
- TBASomaFilmPaul
- 2026The Outer ThreatFilmDaniel Ashford
- 2026The Voices of Our MotherFilmWilliam
- 2025NurembergFilmColonel John Amen
- 2025The Copenhagen TestSeriesEdmund Cobb
- 2025Seven VeilsFilmPaul
- 2025Shadow of GodFilmMason Harper
- 2025The Memory KeeperFilmElizeus Carrier
- 2025TopperFilmTopper
- 2024The StickySeriesCharlie
- 202261st StreetSeriesOfficer Logan
- 2021Blue BayouFilmAce
- 2021The RighteousFilmAaron Smith
- 2020Perry MasonSeriesThomas Milligan
- 2020Your HonorSeriesFather Jay
- 2019Ready or NotFilmAlex
- 2019City on a HillSeriesJimmy Ryan
- 2019Marriage StoryFilmCarter Mitchum
- 2019State Like SleepFilmDarren
- 2019HammerFilmChris Davis
- 2019GoalieFilmTerry Sawchuk
- 2018The Darkest MindsFilmRob Meadows
- 2018Bad Times at the El RoyaleFilmLarsen Rogers
- 2018The Front RunnerFilmBilly Shore
- 2018How It EndsFilmJeremiah
- 2018KinFilmJake
- 2018AnonFilmCyrus Frear
- 2018ParallelFilmJosh
- 2017The Last TycoonSeriesMax Miner
- 2016ArrivalFilmCaptain Marks
- 2016The Dark StrangerFilmMark
- 2016WandererFilmEric
- 2015KilljoysSeriesGrayson Hicks
- 2015How to Plan an Orgy in a Small TownFilmBruce Buck
- 2015End of Days, Inc.FilmJason
- 2015DennisFilmDennis
- 2014Halt and Catch FireSeriesTom Rendon
- 2013HannibalSeriesRandall Tier
- 2013SweetiefaceFilmSam
- 2012Beat DownFilmMichael
- 2010Republic of DoyleSeriesDes Courtney
- 2010Grown Up Movie StarFilmWill
- 2010SnarbuckledFilmJacob O'Higgins
- 2010BradFilmBrad
- 2009Warehouse 13SeriesJerry Hoffler
- 2009Cut from the Same ClothFilmJack Cochrane
- 2009Mum's the WordFilmCurtis
- 2009Quiet at DawnFilmWatts
- 2008The Four HorsemenFilmEric Rollins
- 2008The One That Got AwayFilmTommy Palchek
- 2008Heartless Disappearance Into Labrador SeasFilmCharlie
- 2008EpilogueFilmHenry
Directing 8
Writing 5
Production 7
Editing 4
Crew 1
Filmography from TMDB.