Guest Stars James Clack as Young Martin Françis Renaud as Paul Capoue 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 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
