Cillian O'Sullivan

The Blacklist

2013 · Skip Sutherland

3.0

Vikings

2013 · Eirik

Chicago P.D.

2014 · Shane Sullivan

Daredevil: Born Again

2025 · Devlin

Star Trek: Strange New Worlds

2022 · Dr. Roger Korby

FBI: Most Wanted

2020 · Scot Weitzen

Bull

2016 · Nathan Alexander

Halo: Nightfall

2014 · Christian Ramsey (uncredited)

In From the Cold

2022 · Chauncey

Maze

2017 · Bobby

The Lost Princess

2025 · Alec Touati

Then You Run

2023 · Orin

The Boy That Never Was

2024 · Dave Garrick

Misty Button

2019 · James

6Degrees

2012 · Conor Martin