S1, E2: Marcella tries to make sense of the previous evening's events. Meanwhile, the Gibson family are in a state of panic when Grace is discovered missing, and Marcella scours CCTV footage in an attempt to discover more about Grace's disappearance. Cara returns home from her latest Sinnr exploit. She's managed to swipe a watch, some earrings and a bracelet. Cara's unaware of their significance and the danger she's put herself in - all of these items are recognisable as trophies taken by the Grove Park Killer. Peter Cullen continues his prison work placement at the bakery and is delighted by his budding friendship with a young postgraduate student called Maddy. Marcella warns Maddy that Peter is dangerous, but Maddy assumes she's safe - Peter's supervisor Guy is always with him. But later, we see Guy head out with Peter and leave him to his own devices.