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Acting
May 7, 1984
St. Johns, Newfoundland, Canada
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).

as Cobb

as Colonel John Amen

as Elizeus Carrier

as Mason Harper

as Paul

as Topper

as Charlie

as Officer Logan

as Ace

as Aaron Smith

as Father Jay

as Thomas Milligan

as Chris Davis

as Carter Mitchum

as Self

as Alex Le Domas

as Jimmy Ryan

as Terry Sawchuk

as Darren

as Billy Shore

as Larsen Rogers

as Jake

as Rob Meadows

as Jeremiah

as Cyrus Frear

as Josh

as Max Miner

as Captain Marks

as Eric

as Mark

as Bruce Buck

as Grayson Hicks

as Jason

as Dennis

as Tom Rendon

as Randall Tier
as Sam

as Michael

as Jacob O'Higgins
as Brad

as Des Courtney
as Curtis

as Will
as Watts

as Jerry Hoffler
as Jack Cochrane

as Charlie
as Henry

as Tommy Palchek

as Eric Rollins
as William
as John