Helen tends to a fateful birth and is questioned about her past, while a peculiar girl rouses Ellie's interest.

Cast: Naomie Harris, Katherine Waterston, Emily Watson, Paddy Considine, Nico Parker, Charlotte Gairdner-Mihell, Paul Kaye, Freya Allan, John Dagleish, Mark Lewis Jones, Börje Lundberg, Anna Calder-Marshall, Amer Chadha-Patel, Sonera Angel, Tom Lawrence