Owen Sleater

Owen Sleater arrives in Atlantic City as an IRA gunrunner with business ties to Nucky Thompson, quickly proving himself useful with a gun and a level head. Charming and quietly watchful, he settles into Nucky's employ as muscle and driver, an outsider reading the room before he ever says too much.

Charlie Cox plays him with an easy, disarming warmth that makes his competence with violence land harder when it surfaces — you like him before you clock how dangerous he is. The show uses that gap well, letting his Irish courtliness mask a man who has clearly done hard things and will again.