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).

Mark O’Brien

Acting Born 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).

Known For

The Kelly Clarkson Show

Self

Arrival

Captain Marks

Warehouse 13

Jerry Hoffler

Hannibal

Randall Tier

Killjoys

Grayson Hicks

Halt and Catch Fire

Tom Rendon

Ready or Not

Alex

Marriage Story

Carter Mitchum

City on a Hill

Jimmy Ryan

Perry Mason

Thomas Milligan

Republic of Doyle

Des Courtney

Your Honor

Father Jay