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).
Known for (47 titles)
tvHannibal
2013 · ★ 8.3
tvYour Honor
2020 · ★ 8.0
tvHalt and Catch Fire
2014 · ★ 7.9
movieMarriage Story
2019 · ★ 7.7
tvWarehouse 13
2009 · ★ 7.7
movieArrival
2016 · ★ 7.6
movieNuremberg
2025 · ★ 7.6
movieBlue Bayou
2021 · ★ 7.4
tvCity on a Hill
2019 · ★ 7.3
tvPerry Mason
2020 · ★ 7.2
tvThe Sticky
2024 · ★ 7.2
movieReady or Not
2019 · ★ 7.1
tvThe Last Tycoon
2017 · ★ 7.0
movieThe Darkest Minds
2018 · ★ 7.0
movieThe Memory Keeper
2025 · ★ 7.0
tvRepublic of Doyle
2010 · ★ 7.0
tvKilljoys
2015 · ★ 6.9
movieBad Times at the El Royale
2018 · ★ 6.8
movieGoalie
2019 · ★ 6.8
tvThe Copenhagen Test
2025 · ★ 6.6
movieThe Voices of Our Mother
2026 · ★ 6.4
movieThe Righteous
2021 · ★ 6.3
tv61st Street
2022 · ★ 6.2
tvThe Kelly Clarkson Show
2019 · ★ 6.2
movieKin
2018 · ★ 6.1
movieAnon
2018 · ★ 6.0
movieThe Four Horsemen
2008 · ★ 6.0
movieParallel
2018 · ★ 6.0
movieThe Front Runner
2018 · ★ 5.9
movieEnd of Days, Inc.
2015 · ★ 5.8
movieShadow of God
2025 · ★ 5.6
movieThe Outer Threat
2026 · ★ 5.5
movieSeven Veils
2025 · ★ 5.5
movieHammer
2019 · ★ 5.5
movieTopper
2025 · ★ 5.3
movieHow It Ends
2018 · ★ 5.3
movieHow to Plan an Orgy in a Small Town
2015 · ★ 5.1
movieGrown Up Movie Star
2010 · ★ 5.1
movieWanderer
2016 · ★ 5.0
movieThe Dark Stranger
2016 · ★ 4.9
movieState Like Sleep
2019 · ★ 4.7
movieThe One That Got Away
2008 · ★ 4.3
movieHeartless Disappearance Into Labrador Seas
2008 · ★ 0.0
movieSnarbuckled
2010 · ★ 0.0
movieBeat Down
2012 · ★ 0.0
movieDennis
2015 · ★ 0.0
movieLittle One
★ 0.0