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).
Born: May 7, 1984 · St. Johns, Newfoundland, Canada
Filmography (36)
TV
The Copenhagen Test
2025
Actor: Edmund Cobb
Nuremberg
2025
Actor: Colonel John Amen
Shadow of God
2025
Actor: Mason Harper
Seven Veils
2025
Actor: Paul
TV
The Sticky
2024
Actor: Charlie
TV
61st Street
2022
Actor: Officer Logan
Blue Bayou
2021
Actor: Ace
The Righteous
2021
Actor: Aaron SmithExecutive Producer+2
TV
Your Honor
2020
Actor: Father Jay
TV
Perry Mason
2020
Actor: Thomas Milligan
Hammer
2019
Actor: Chris Davis
Marriage Story
2019
Actor: Carter Mitchum
TV
The Kelly Clarkson Show
2019
Actor
Ready or Not
2019
Actor: Alex Le Domas
TV
City on a Hill
2019
Actor: Jimmy Ryan
Goalie
2019
Actor: Terry SawchukExecutive Producer
State Like Sleep
2019
Actor: Darren
The Front Runner
2018
Actor: Billy Shore
Bad Times at the El Royale
2018
Actor: Larsen Rogers
Kin
2018
Actor: Jake
The Darkest Minds
2018
Actor: Rob Meadows
How It Ends
2018
Actor: Jeremiah
Anon
2018
Actor: Cyrus Frear
Parallel
2018
Actor: Josh
TV
The Last Tycoon
2017
Actor: Max Miner
Arrival
2016
Actor: Captain Marks
The Dark Stranger
2016
Actor: Mark
How to Plan an Orgy in a Small Town
2015
Actor: Bruce Buck
TV
Killjoys
2015
Actor: Grayson Hicks
End of Days, Inc.
2015
Actor: Jason
TV
Halt and Catch Fire
2014
Actor: Tom Rendon
TV
Hannibal
2013
Actor: Randall Tier
TV
Republic of Doyle
2010
Actor: Des Courtney
Grown Up Movie Star
2009
Actor: Will
TV
Warehouse 13
2009
Actor: Jerry Hoffler
The Four Horsemen
2008
Actor: Eric Rollins