Mark O'Brien
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).
42Credits12 TV · 30 films
2008–2026Years activefirst to latest
8.3 Highest ratedHannibal
6.4 Average ratingacross 37 titles
Top TV shows 12best Mark O'Brien shows
- 1
HannibalRandall Tier · 2 eps · 2013 - 2
Your HonorFather Jay · 3 eps · 2020 - 3
Halt and Catch FireTom Rendon · 15 eps · 2014 - 4
Warehouse 13Jerry Hoffler · 1 ep · 2009 - 5
City on a HillJimmy Ryan · 14 eps · 2019 - 6
Perry MasonThomas Milligan · 7 eps · 2020 - 7
The StickyCharlie · 1 ep · 2024 - 8
Republic of DoyleDes Courtney · 77 eps · 2010 - 9
The Last TycoonMax Miner · 9 eps · 2017 - 10
61st StreetOfficer Logan · 8 eps · 2022 - 11
KilljoysGrayson Hicks · 1 ep · 2015 - 12
The Copenhagen TestEdmund Cobb · 8 eps · 2025
Top movies 30best Mark O'Brien movies
- 1
Marriage StoryCarter Mitchum · 2019 - 2
ArrivalCaptain Marks · 2016 · Drama - 3
NurembergColonel John Amen · 2025 - 4
Blue BayouAce · 2021 - 5
Ready or NotAlex · 2019 · Horror - 6
The Darkest MindsRob Meadows · 2018 · Action - 7
GoalieTerry Sawchuk · 2019 - 8
Bad Times at the El RoyaleLarsen Rogers · 2018 - 9
The RighteousAaron Smith · 2021 - 10
KinJake · 2018 - 11
AnonCyrus Frear · 2018 - 12
ParallelJosh · 2018 - 13
The Front RunnerBilly Shore · 2018 - 14
Shadow of GodMason Harper · 2025 - 15
End of Days, Inc.Jason · 2015 - 16
Seven VeilsPaul · 2025 - 17
HammerChris Davis · 2019 - 18
TopperTopper · 2025 - 19
How It EndsJeremiah · 2018 - 20
Grown Up Movie StarWill · 2010 - 21
How to Plan an Orgy in a Small TownBruce Buck · 2015 - 22
The Dark StrangerMark · 2016 - 23
State Like SleepDarren · 2019 - 24
The One That Got AwayTommy Palchek · 2008 - 25
The Four HorsemenEric Rollins · 2008 - 26
The Voices of Our MotherWilliam · 2026 - 27
Beat DownMichael · 2012 - 28
Heartless Disappearance Into Labrador SeasCharlie · 2008 - 29Cut from the Same ClothJack Cochrane · 2009
- 30
SnarbuckledJacob O'Higgins · 2010
