Guest Stars James Clack as Young Martin Jake Curran as Padraig Pearse O'leary Izabella Urbanowicz as Rosie Demarczyk Françis Renaud as Paul Capoue Nathaniel Spender as Young Jean Héléna Soubeyrand as Clothilde Maxime Lefrançois as Romain Damien Taranto as Nico Sarah Niles as DCI Diane Squire Tolga Safer as Hakan Philip Arditti as Veysel Saskia Wickham as Teacher Amy Griffiths as Louisa Sarah Ball as Trisha Kendrick
