Guest Stars Carolina Valdés as Nadiuska De Sancha Rebecca Scroggs as Ari Branson Alec Newman as Joe Baker Lucy Phelps as Saskia Cobb Faith Alabi as Layla Backhurst Stephen Boxer as Dr. Roger Gunnislake Lu Corfield as Sgt Tania Walsh Daniel Adegboyega as Marcus Backhurst Ernest Kingsley Jr. as Luke Joséphine De La Baume as Julia Giroux Antony Byrne as Jim Telby Jayne McKenna as Janet Telby Ellis George as Callie Backhurst Shamail Ali as Babbar Seham Aar as Sia Amina Koroma as Kumba
