Biography
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).
Mark O'Brien
Acting
St. Johns, Newfoundland, Canada
Born
Movies
Nuremberg· 2025
Colonel John Amen
Seven Veils· 2025
Paul
Shadow of God· 2025
Mason Harper
The Memory Keeper· 2025
Elizeus Carrier
Topper· 2025
Topper
Blue Bayou· 2021
Ace
The Righteous· 2021
Aaron Smith
Goalie· 2019
Terry Sawchuk
Hammer· 2019
Chris Davis
Marriage Story· 2019
Carter Mitchum
Ready or Not· 2019
Alex Le Domas
State Like Sleep· 2019
Darren
Anon· 2018
Cyrus Frear
Bad Times at the El Royale· 2018
Larsen Rogers
How It Ends· 2018
Jeremiah
Kin· 2018
Jake
Parallel· 2018
Josh
The Darkest Minds· 2018
Rob Meadows
The Front Runner· 2018
Billy Shore
Arrival· 2016
Captain Marks
The Dark Stranger· 2016
Mark
Wanderer· 2016
Eric
Dennis· 2015
Dennis
End of Days, Inc.· 2015
Jason
How to Plan an Orgy in a Small Town· 2015
Bruce Buck
Sweetieface· 2013
Sam
Beat Down· 2012
Michael
Brad· 2010
Brad
Grown Up Movie Star· 2010
Will
Snarbuckled· 2010
Jacob O'Higgins
Cut from the Same Cloth· 2009
Jack Cochrane
Mum's the Word· 2009
Curtis
Quiet at Dawn· 2009
Watts
Epilogue· 2008
Henry
Heartless Disappearance Into Labrador Seas· 2008
Charlie
The Four Horsemen· 2008
Eric Rollins
The One That Got Away· 2008
Tommy Palchek
Better People
John
Nice People
The Outer Threat
The Voices of Our Mother
William
TV shows
The Copenhagen Test· 2025
Edmund Cobb
The Sticky· 2024
Charlie
61st Street· 2022
Officer Logan
Perry Mason· 2020
Thomas Milligan
Your Honor· 2020
Father Jay
City on a Hill· 2019
Jimmy Ryan
The Kelly Clarkson Show· 2019
Self
The Last Tycoon· 2017
Max Miner
Killjoys· 2015
Grayson Hicks
Halt and Catch Fire· 2014
Tom Rendon
Hannibal· 2013
Randall Tier
Republic of Doyle· 2010
Des Courtney
Warehouse 13· 2009
Jerry Hoffler