Cillian O'Sullivan is an actor, known for 6Degrees (2012), An Cosc (2009) and Uncle Bill's Barrel (2008).
The Blacklist - Season 8
The Blacklist - Season 10
Bull - Season 5
Vikings - Season 3
Chicago P.D. - Season 3
The Blacklist - Season 5
Maze (2017)
Chicago P.D. - Season 2
Vikings - Season 1
Chicago P.D. - Season 9
Vikings - Season 6
The Blacklist - Season 1
Then You Run - Season 1
Vikings - Season 5
FBI: Most Wanted - Season 6
FBI: Most Wanted - Season 5
Chicago P.D. - Season 8
Vikings - Season 2
The Blacklist - Season 9
Chicago P.D. - Season 7
Chicago P.D. - Season 6
The Blacklist - Season 6
Halo: Nightfall
Chicago P.D. - Season 12
The Blacklist - Season 3
Chicago P.D. - Season 11