Cillian O'Sullivan

2020s

1. 2025
   

   The Lost Princess

   Alec Touati

   51
2. 

   Daredevil: Born Again

   Devlin · 3 episodes

   81
3. 2024
   

   The Boy That Never Was

   Dave Garrick · 3 episodes

   62
4. 2023
   

   Then You Run

   Orin · 8 episodes

   57
5. 2022
   

   Star Trek: Strange New Worlds

   Dr. Roger Korby · 4 episodes

   81
6. 

   In From the Cold

   Chauncey · 8 episodes

   64
7. 2020
   

   FBI: Most Wanted

   Scot Weitzen · 1 episode

   71

2010s

1. 2019

   Misty Button

   James

2. 2017
   

   Maze

   Bobby

   54
3. 2016
   

   Bull

   Nathan Alexander · 1 episode

   71
4. 2014
   

   Halo: Nightfall

   Christian Ramsey (uncredited)

   59
5. 

   Chicago P.D.

   Shane Sullivan · 1 episode

   82
6. 2013
   

   The Blacklist

   Skip Sutherland · 2 episodes

   78
7. 

   Vikings

   Eirik · 1 episode

   84
8. 2012

   6Degrees

   Conor Martin · 18 episodes