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).
Seven Veils
(Paul)
The Four Horsemen
(Eric Rollins)
Grown Up Movie Star
(Will)
Cut from the Same Cloth
(Jack Cochrane)
Heartless Disappearance Into Labrador Seas
(Charlie)
Shadow of God
(Mason Harper)
Snarbuckled
(Jacob O'Higgins)
The Dark Stranger
(Mark)
Nuremberg
(Col. John Amen)
End of Days, Inc.
(Jason)
The Voices of Our Mother
(William)
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)
Mum's the Word
(Curtis)
Epilogue
(Henry)
Brad
(Brad)
The Embers and the Stars
Dennis
(Dennis)
Perry Mason
(Thomas Milligan)
Republic of Doyle
(Des Courtney)
The Last Tycoon
(Max Miner)
61st Street
(Officer Logan)
Killjoys
(Grayson Hicks)
The Kelly Clarkson Show
City on a Hill
(Jimmy Ryan)
Hannibal
(Randall Tier)
Warehouse 13
(Jerry Hoffler)
Halt and Catch Fire
(Tom Rendon)
Your Honor
(Father Jay)
Copenhagen
(Cobb)
