Guest Stars Duncan Pow as Dr. James Haslam Stephanie Gil as Ellie Bailey Emma Stansfield as Emma Black Judah Cousin as Toby Daszkiewicz Sophia Ally as Gracie Sturgess Kierra Thompson as Annie Bailey Amber Aga as DI Lata Mishra Faye McKeever as Jayne McNaughten Michael Shaeffer as Stephen Kemp Jill Winternitz as Yulia Skripal Melanie Gutteridge as Claire Sturgess Wayne Swann as Sergei Skripal Kimberley Nixon as Hannah Mitchell Joanne Henry as Woman 2 Mark Weinman as Major McPherson Katherine Jakeways as DS Janet Brown Stephen Kennedy as Jimmy Emma Noakes as DS Izzy Rawlings Katherine Jack as Police Officer Andy Gathergood as Sergeant Tom Mackle Candida Gubbins as Woman 1