Guest Stars James Clack as Young Martin Jake Curran as Padraig Pearse O'leary Izabella Urbanowicz as Rosie Demarczyk Françis Renaud as Paul Capoue Héléna Soubeyrand as Clothilde Nathaniel Spender as Young Jean Sam Mackay as Denny Simon Ludders as Peter Marshall-Edwards Bailey Hayden as Steven Tomos Eames as Pete Polly Dartford as Orla