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).
39 movies · 13 shows
The Outer Threat
2026·5.8
The Voices of Our Mother
2026·6.4
Nuremberg
2025·7.6
The Memory Keeper
2025·0.0
Shadow of God
2025·5.7
Seven Veils
2025·5.7
Topper
2025·5.3
Blue Bayou
2021·7.4
The Righteous
2021·6.3
Hammer
2019·5.4
Marriage Story
2019·7.7
Ready or Not
2019·7.1
Goalie
2019·6.8
State Like Sleep
2019·4.7
The Front Runner
2018·5.9
Bad Times at the El Royale
2018·6.8
Kin
2018·6.1
The Darkest Minds
2018·7.0
How It Ends
2018·5.3
Anon
2018·6.0
Parallel
2018·6.0
Arrival
2016·7.6
Wanderer
2016·0.0
The Dark Stranger
2016·4.9
How to Plan an Orgy in a Small Town
2015·5.1
End of Days, Inc.
2015·5.8
Dennis
2015·0.0
Sweetieface
2013·0.0
Beat Down
2012·0.0
Snarbuckled
2010·0.0
Brad
2010·0.0
Grown Up Movie Star
2010·5.1
Mum's the Word
2009·0.0
Quiet at Dawn
2009·0.0
Cut from the Same Cloth
2009·0.0
Heartless Disappearance Into Labrador Seas
2008·0.0
Epilogue
2008·0.0
The One That Got Away
2008·4.3
The Four Horsemen
2008·5.1