Mark O'Brien
Where to watch Mark O'Brien in United States. On screen since 2008. Licensed apps only — 24 titles we track below.
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).
Where to watch their titles
Arrival
Captain Marks · 2016
Marriage Story
Carter Mitchum · 2019
Ready or Not
Alex · 2019
Bad Times at the El Royale
Larsen Rogers · 2018
Hannibal
Randall Tier · 2013
The Darkest Minds
Rob Meadows · 2018
How It Ends
Jeremiah · 2018
Anon
Cyrus Frear · 2018
Your Honor
Father Jay · 2020
Nuremberg
Colonel John Amen · 2025
Kin
Jake · 2018
Warehouse 13
Jerry Hoffler · 2009
Halt and Catch Fire
Tom Rendon · 2014
Killjoys
Grayson Hicks · 2015
Perry Mason
Thomas Milligan · 2020
The Front Runner
Billy Shore · 2018
Blue Bayou
Ace · 2021
City on a Hill
Jimmy Ryan · 2019
Parallel
Josh · 2018
How to Plan an Orgy in a Small Town
Bruce Buck · 2015
The Copenhagen Test
Edmund Cobb · 2025
The Sticky
Charlie · 2024
The Kelly Clarkson Show
Self · 2019
The Last Tycoon
Max Miner · 2017