Mark O'Brien
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).
Personal Details
Also Known As
Movies (37)
Nuremberg
as Colonel John Amen
2025
Falsehood
as Elizeus Carrier
2025
Shadow of God
as Mason Harper
2025
Seven Veils
as Paul
2025
Topper
as Topper
2025
Blue Bayou
as Ace
2021
The Righteous
as Aaron Smith
2021
Hammer
as Chris Davis
2019
Marriage Story
as Carter Mitchum
2019
Ready or Not
as Alex Le Domas
2019
Goalie
as Terry Sawchuk
2019
State Like Sleep
as Darren
2019
The Front Runner
as Billy Shore
2018
Bad Times at the El Royale
as Larsen Rogers
2018
Kin
as Jake
2018
The Darkest Minds
as Rob Meadows
2018
How It Ends
as Jeremiah
2018
Anon
as Cyrus Frear
2018
Parallel
as Josh
2018
Arrival
as Captain Marks
2016
Wanderer
as Eric
2016
The Dark Stranger
as Mark
2016
How to Plan an Orgy in a Small Town
as Bruce Buck
2015
End of Days, Inc.
as Jason
2015
Dennis
as Dennis
2015
Sweetieface
as Sam
2013
Beat Down
as Michael
2012
Kathy
Director (Directing)
2011
Snarbuckled
as Jacob O'Higgins
2010
Brad
as Brad
2010
Mum's the Word
as Curtis
2009
Grown Up Movie Star
as Will
2009
Quiet at Dawn
as Watts
2009
Cut from the Same Cloth
as Jack Cochrane
2009
Heartless Disappearance Into Labrador Seas
as Charlie
2008
Epilogue
as Henry
2008
Pretty Girls
Director (Directing)
2008
TV Shows (13)
The Copenhagen Test
as Edmund Cobb
2025
The Sticky
as Charlie
2024
61st Street
as Officer Logan
2022
Your Honor
as Father Jay
2020
Perry Mason
as Thomas Milligan
2020
The Kelly Clarkson Show
as Self
2019
City on a Hill
as Jimmy Ryan
2019
The Last Tycoon
as Max Miner
2017
Killjoys
as Grayson Hicks
2015
Halt and Catch Fire
as Tom Rendon
2014
Hannibal
as Randall Tier
2013
Republic of Doyle
as Des Courtney
2010
Warehouse 13
as Jerry Hoffler
2009