Mark O'Brien Biography
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).
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He's dying to save mankind.
The future favors the brave.
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Not all causes are lost.
In this family, deceit runs deep.
Every path has a price.