Guest Stars James Clack as Young Martin Jake Curran as Padraig Pearse O'leary Izabella Urbanowicz as Rosie Demarczyk Nathaniel Spender as Young Jean Héléna Soubeyrand as Clothilde Maxime Lefrançois as Romain Sam Mackay as Denny Damien Taranto as Nico Vincent Riotta as DCI Tom Kendrick Abubakar Salim as Charlie Itoya Osagiede as Efe Obriorah Rachel O'Meara as Headteacher Daisy Ashford as PA
