Ivy is faced with the prospect of putting her own life at risk in order to save Phoebe. Carne and Merchant try to find a way to ensure her safety but have underestimated Mark White, putting themselves in danger.

Cast: Jodie Comer, Richard Rankin, Valene Kane, Mark Flitton, Ariyon Bakare, Nicola Stuart-Hill, Natasha Little, Stuart Graham, Katherine Rose Morley, Charles Babalola, Rachael Spence, Peter McDonald, Isabel Shanahan, Aneurin Barnard, Kemi-Bo Jacobs