Actor

Mark O'Brien

TMDb person ID 225411

Sign in to favorite

Roles

The Kelly Clarkson Show

TV · 2019

Hannibal

TV · 2013

Warehouse 13

TV · 2009

Halt and Catch Fire

TV · 2014

Arrival

Movie · 2016

Perry Mason

TV · 2020

Thomas Milligan

Republic of Doyle

TV · 2010

Killjoys

TV · 2015

Your Honor

TV · 2020

Ready or Not

Movie · 2019

City on a Hill

TV · 2019

Nuremberg

Movie · 2025

Colonel John Amen

The Copenhagen Test

TV · 2025

Marriage Story

Movie · 2019

Bad Times at the El Royale

Movie · 2018

61st Street

TV · 2022

The Last Tycoon

TV · 2017

The Darkest Minds

Movie · 2018

How It Ends

Movie · 2018

Anon

Movie · 2018

The Front Runner

Movie · 2018