S1, E3: Four-part thriller about a female detective with dark secrets in her past. Bancroft receives a startling blast from the past that brings events from 1990 back to the surface. Katherine wrestles with twists and turns of the new information she is uncovering, and is faced with a chilling truth. Bancroft secures Zaheera in safe accommodation and Daanish fulfils his part of the deal. Anya makes a surprising visit to an old friend.