Mark O'Brien
- Known for
- Acting
- Born
- May 7, 1984 (age 42)
- Place of birth
- St. Johns, Newfoundland, Canada
- Credits
- 57
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).
Known for
Filmography
The Outer Threat
2026Movie
Daniel Ashford
The Voices of Our Mother
2026Movie
William
The Copenhagen Test
2025TV
Edmund Cobb
Nuremberg
2025Movie
Colonel John Amen
The Memory Keeper
2025Movie
Elizeus Carrier
Shadow of God
2025Movie
Mason Harper
Seven Veils
2025Movie
Paul
Topper
2025Movie
Topper
The Sticky
2024TV
Charlie
61st Street
2022TV
Officer Logan
Blue Bayou
2021Movie
Ace
The Righteous
2021Movie
Aaron Smith
Your Honor
2020TV
Father Jay
Perry Mason
2020TV
Thomas Milligan
Hammer
2019Movie
Chris Davis
Marriage Story
2019Movie
Carter Mitchum
The Kelly Clarkson Show
2019TV
Self
Ready or Not
2019Movie
Alex
City on a Hill
2019TV
Jimmy Ryan
Goalie
2019Movie
Terry Sawchuk
State Like Sleep
2019Movie
Darren
The Front Runner
2018Movie
Billy Shore
Bad Times at the El Royale
2018Movie
Larsen Rogers
Kin
2018Movie
Jake
The Darkest Minds
2018Movie
Rob Meadows
How It Ends
2018Movie
Jeremiah
Anon
2018Movie
Cyrus Frear
Parallel
2018Movie
Josh
The Last Tycoon
2017TV
Max Miner
Arrival
2016Movie
Captain Marks
Wanderer
2016Movie
Eric
The Dark Stranger
2016Movie
Mark
How to Plan an Orgy in a Small Town
2015Movie
Bruce Buck
Killjoys
2015TV
Grayson Hicks
End of Days, Inc.
2015Movie
Jason
Dennis
2015Movie
Dennis
Halt and Catch Fire
2014TV
Tom Rendon
Hannibal
2013TV
Randall Tier
Sweetieface
2013Movie
Sam
Beat Down
2012Movie
Michael
Snarbuckled
2010Movie
Jacob O'Higgins
Brad
2010Movie
Brad
Grown Up Movie Star
2010Movie
Will
Republic of Doyle
2010TV
Des Courtney
Mum's the Word
2009Movie
Curtis
Quiet at Dawn
2009Movie
Watts
Warehouse 13
2009TV
Jerry Hoffler
Cut from the Same Cloth
2009Movie
Jack Cochrane
Heartless Disappearance Into Labrador Seas
2008Movie
Charlie
Epilogue
2008Movie
Henry
The One That Got Away
2008Movie
Tommy Palchek
The Four Horsemen
2008Movie
Eric Rollins
Little One
Movie
Soma
Movie
Paul
Good in the Room
Movie
Charlie
Better People
Movie
John
Nice People
Movie