Guest Stars James Clack as Young Martin Françis Renaud as Paul Capoue Jake Curran as Padraig Pearse O'leary Izabella Urbanowicz as Rosie Demarczyk 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 Amy Griffiths as Louisa Saskia Wickham as Teacher Sarah Ball as Trisha Kendrick
