Samuel Barnett

as Alan

as Cecil Beaton

as Matthews

as Ariel Porter

as Didier Laurent

as Ryan Edwards

as Mr. Smith

as Matthews

as Colin

as Dirk Gently

as Donald

as Aimwell

as Nathanial

as Advocate Bob

as Renfield

as Young Stuart

as Anthony Donn

as Sebastian

as Young Dickens(Voice)

as Daniel Stroud

as Mr. Severn

as John Millais

as Billy

as Adult Simon Doonan

as Thomas Adams

as Posner

as Paul

as Sergeant Tiddler

as Doddington

as Joe Steeples

as Brian Byrne

as Sex Shop Assistant

as Philip's Schoolmate