Mark O'Brien
Acting
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).
Filmography
56
The Voices of Our Mother
2026
The Copenhagen Test
2025
Nuremberg
2025
The Memory Keeper
2025
Shadow of God
2025
Seven Veils
2025
Topper
2025
The Sticky
2024
61st Street
2022
Blue Bayou
2021
The Righteous
2021
Your Honor
2020
Perry Mason
2020
Hammer
2019
Marriage Story
2019
The Kelly Clarkson Show
2019
Ready or Not
2019
City on a Hill
2019
Goalie
2019
State Like Sleep
2019
The Front Runner
2018
Bad Times at the El Royale
2018
Kin
2018
The Darkest Minds
2018
How It Ends
2018
Anon
2018
Parallel
2018
The Last Tycoon
2017
Arrival
2016
Wanderer
2016
The Dark Stranger
2016
How to Plan an Orgy in a Small Town
2015
Killjoys
2015
End of Days, Inc.
2015
Dennis
2015
Halt and Catch Fire
2014
Hannibal
2013
Sweetieface
Sweetieface
2013
Beat Down
2012
Snarbuckled
2010
Brad
Brad
2010
Grown Up Movie Star
2010
Republic of Doyle
2010
Mum's the Word
Mum's the Word
2009
Quiet at Dawn
Quiet at Dawn
2009
Warehouse 13
2009
Cut from the Same Cloth
Cut from the Same Cloth
2009
Heartless Disappearance Into Labrador Seas
2008
Epilogue
Epilogue
2008
The One That Got Away
2008
The Four Horsemen
2008
The Outer Threat
The Outer Threat
Better People
Better People
Nice People
Nice People
Good in the Room
Good in the Room
Little One