Guest Stars Pippa Nixon as Sarah Niamh Algar as Orla Maguire Clare Holman as Colonel Reese Steven Cree as Andrew Bentham Jessica Gunning as Pam Tony Pitts as Lennox Samuel Leakey as 7 Year Old Caden Angélica Aragón as Veronica Orton O'Brien as 10 Year Old Caden Heather Craney as Emily Guy Rhys as Young Officer Quique Medina as Ignacio Cortes Jay Simpson as DCI Turner Roberto Mateos as Felipe Alarcon Eddie Toll as DC Reeves Fanny Gautier as Patricia Magana Emma Dewhurst as Journalist