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).
Seven Veils
Paul
The Four Horsemen
Eric Rollins
Grown Up Movie Star
Will
Heartless Disappearance Into Labrador Seas
Charlie
Shadow of God
Mason Harper
Snarbuckled
Jacob O'Higgins
The Dark Stranger
Mark
Nuremberg
Colonel John Amen
End of Days, Inc.
Jason
Beat Down
Michael
Arrival
Captain Marks
Anon
Cyrus Frear
State Like Sleep
Darren
Kin
Jake
Parallel
Josh
The Darkest Minds
Rob Meadows
How to Plan an Orgy in a Small Town
Bruce Buck
Bad Times at the El Royale
Larsen Rogers
Marriage Story
Carter Mitchum
The Front Runner
Billy Shore
How It Ends
Jeremiah
Goalie
Terry Sawchuk
Hammer
Chris Davis
Ready or Not
Alex Le Domas
Blue Bayou
Ace
The Righteous
Aaron Smith
Dennis
Dennis
Falsehood
Elizeus Carrier
Topper
Topper
The One That Got Away
Tommy Palchek
Wanderer
Eric