Mark O'Brien
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).
also starring Mark O'Brien
Seven Veils
As Paul
The Four Horsemen
As Eric Rollins
Grown Up Movie Star
As Will
Cut from the Same Cloth
As Jack Cochrane
Heartless Disappearance Into Labrador Seas
As Charlie
Shadow of God
As Mason Harper
Snarbuckled
As Jacob O'Higgins
The Dark Stranger
As Mark
Nuremberg
As Col. John Amen
End of Days, Inc.
As Jason
The Voices of Our Mother
As William
Beat Down
As Michael
Arrival
As Captain Marks
Anon
As Cyrus Frear
State Like Sleep
As Darren
Kin
As Jake
Parallel
As Josh
The Darkest Minds
As Rob Meadows
How to Plan an Orgy in a Small Town
As Bruce Buck
Bad Times at the El Royale
As Larsen Rogers
Marriage Story
As Carter Mitchum
The Front Runner
As Billy Shore
How It Ends
As Jeremiah
Goalie
As Terry Sawchuk
Hammer
As Chris Davis
Ready or Not
As Alex Le Domas
Blue Bayou
As Ace
The Righteous
As Aaron Smith
Mum's the Word
As Curtis
Epilogue
As Henry
Brad
As Brad
The Embers and the Stars
Dennis
As Dennis
Perry Mason
As Thomas Milligan
Republic of Doyle
As Des Courtney
The Last Tycoon
As Max Miner
61st Street
As Officer Logan
Killjoys
As Grayson Hicks
The Kelly Clarkson Show
City on a Hill
As Jimmy Ryan
Hannibal
As Randall Tier
Warehouse 13
As Jerry Hoffler
Halt and Catch Fire
As Tom Rendon
Your Honor
As Father Jay
Copenhagen
As Cobb
The Sticky
As Charlie