Aidan Gillen

as F.M.

as Vasily Zarubin

as Hunne

as Drew

as Hamilton Barnes

as Freddy Darby

as Power

as Self

as Steven Shadowwhispers (voice)

as James Joyce

as Valentine Barber

as Butler

as Milo Sunter

as Frank Kinsella

as Jack Blackwell

as Peter

as Aidan

as Narrator (voice)

as Allen Hynek

as John Reid

as Dave Allen

as Janson

as Littlefinger (voice)

as William "Goosefat Bill"

as Robert

as Aidan

as Timothy Leary

as Timothy Leary

as Paul Serene

as Robert Lawlor

as Ambrosio O'Higgins

as Janson

as Narrator

as Carver

as Will

as Pelf

as Charles J. Haughey

as Master

as Dr. Frank Harte

as Aberama Gold

as Clayton Cote

as Lars

as Gerry Devine

as Ray

as Man (Ekki Múkk)

as Everett Newcombe

as Man

as CIA Op

as Gerry

as Michael

as Barry Weiss

as Petyr 'Littlefinger' Baelish

as Patrick

as Phil Hendricks

as Phil Hendricks

as Aiden

as John Boy Power

as DI John Bloom

as Gus

as Miles Jackson

as Karl

as Self

as Self

as Self

as Paul

as Paul

as Steve Fallon

as Jimmy Colby

as Conor

as Joe Wilde

as Stephen

as Steve Fallon

as Lord Nelson Rathbone

as Dave Turner

as Tommy Carcetti

as Glenn Taylor

as Puttnam

as Carver Doone

as Frank

as Carver Doone

as Jeff Obold

as Francis

as Pool Player

as Stuart Jones

as Baby

as Paddy

as Frank

as Gerard Quigley

as Aidan Lynch

as Gypo

as Marine Wilcox

as Harry

as James Crozier

as Martin Kemp (as Adrian Murphy)

as Amyas Crale

as Prostitute Boy

as Harry

as Youth at Liquor Store (as Aiden Murphy)

as Gypo

as Jeff Barratt

as James Joyce

as Dickinson

as F.M.

as Host — Presenter