Mark O'Brien
Acting
1984-05-07 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
6.4
The Kelly Clarkson Show
2019 · tv
8.3
Hannibal
2013 · tv
7.1
Ready or Not
2019 · movie
7.7
Warehouse 13
2009 · tv
7.6
Arrival
2016 · movie
7.4
Nuremberg
2025 · movie
7.9
Halt and Catch Fire
2014 · tv
6.9
Killjoys
2015 · tv
7.2
Perry Mason
2020 · tv
7.0
Republic of Doyle
2010 · tv
8.1
Your Honor
2020 · tv
6.4
The Copenhagen Test
2025 · tv
7.2
City on a Hill
2019 · tv
7.7
Marriage Story
2019 · movie
7.0
The Darkest Minds
2018 · movie
6.0
Anon
2018 · movie
6.8
Bad Times at the El Royale
2018 · movie
6.9
61st Street
2022 · tv
6.1
Kin
2018 · movie
5.3
How It Ends
2018 · movie
7.0
The Last Tycoon
2017 · tv
7.2
The Sticky
2024 · tv
6.0
Parallel
2018 · movie
5.9
The Front Runner
2018 · movie
7.5
Blue Bayou
2021 · movie
5.7
Shadow of God
2025 · movie
5.1
How to Plan an Orgy in a Small Town
2015 · movie
5.6
Seven Veils
2025 · movie
5.4
Hammer
2019 · movie
4.7
State Like Sleep
2019 · movie