
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 Daniel Ashford

as William

as Colonel John Amen

as Elizeus Carrier

as Mason Harper

as Paul

as Topper

as Ace

as Aaron Smith

as Chris Davis

as Carter Mitchum

as Alex

as Terry Sawchuk

as Darren

as Billy Shore

as Larsen Rogers

as Jake

as Rob Meadows

as Jeremiah

as Cyrus Frear

as Josh

as Captain Marks

as Eric

as Mark

as Bruce Buck

as Jason

as Dennis

as Sam

as Michael

as Jacob O'Higgins

as Brad

as Will

as Curtis

as Watts

as Jack Cochrane

as Henry

as Tommy Palchek

as Eric Rollins

as John

as Charlie

as Paul