Mark O'Brien
Filmography

Mark O'Brien

ActorBorn May 7, 1984 St. Johns, Newfoundland, Canada48 titles

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).

Movies & shows — tap any title to see where it streams

Arrival
Arrival
2016 · 7.6
Captain Marks
Ready or Not
Ready or Not
2019 · 7.1
Alex
Nuremberg
Nuremberg
2025 · 7.6
Colonel John Amen
Bad Times at the El Royale
Bad Times at the El Royale
2018 · 6.8
Larsen Rogers
Marriage Story
Marriage Story
2019 · 7.7
Carter Mitchum
How It Ends
How It Ends
2018 · 5.3
Jeremiah
The Darkest Minds
The Darkest Minds
2018 · 7.0
Rob Meadows
Anon
Anon
2018 · 6.0
Cyrus Frear
The Outer Threat
The Outer Threat
2026 · 5.7
Daniel Ashford
Kin
Kin
2018 · 6.1
Jake