Michael McElhatton

as Jimmy

as Eamonn McCarty

as John Potter · 8 episodes

as Narrator · 2 episodes

as Orson

as CC Ronald Gregory · 7 episodes

as Jean de Merteuil · 8 episodes

as Finbar · 8 episodes

as Tam al'Thor · 3 episodes

as Lieutenant

as Bernard de Latour

as Black Clad Alpha

as Ward

as Jafet Lindeberg

as Frank Delaney

as Prosecutor Andrei Stepashin · 5 episodes

as Sir Arthur Conan Doyle

as Poem Narrator

as Bill Tuttle · 6 episodes

as Felix (voice)

as Petrovich (voice)

as Dr. Markoe · 6 episodes

as Black Clad Alpha

as Jim Kavanagh

as Jack's Eye

as Philipp Lenard / Jonas Salk · 11 episodes

as Jerzyk

as Walter Curly

as Sheriff Sheldon

as General McEntee

as Matt Quinn

as Laurence (voice)

as Colm Donnelly

as Black Knight

as John Hawkins · 3 episodes

as Rob Breedlove · 4 episodes

as Brian · 3 episodes

as Albert Hatton · 7 episodes

as Liam Hughes

as Mr. Moore

as James Clarke

as Roose Bolton · 25 episodes

as Ross

as Pat Lynch

as Frank

as Ivan

as Robbie

as Leo Amery MP

as Dr. Alex Loden

as Mechanic

as Martin (voice)

as Ghost of Christmas Present · 1 episode

as Dandy (Voice)

as Rats

as narrator

as Sam

as Jock

as Robert

as Cathal Brugha · 4 episodes

6 episodes

as John Traynor

as Voice

as Garrett

as Detective Sergeant Hogan

as Comdt. Ed Breslin

as Johnner Doyle

as John

Writer