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 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 Sarah Ball as Trisha Kendrick Amy Griffiths as Louisa
