Jenn and DS Med Kharim track Col Farley to a seafront fish and chip shop (his nickname is ironic – he hates fish). Col admits Leah was behind on payments but swears he didn't harm her. He says someone else was following her – a man in a grey BMW.

Marcus is arrested while trying to flee across the sands. In the back of the police car, he looks at Jenn and says: "You think you're saving them? You can't even save your own daughter." (Jenn has no daughter – he's clearly confusing her with someone else... or is he?)

The victim is identified as Leah Sumner , a 22-year-old care leaver who worked at a local arcade and lived in a hostel. Jenn visits the hostel and finds her room ransacked. The manager admits that Leah owed money to a loan shark named Col "The Fish" Farley .

CCTV from the arcade shows Leah getting into a grey BMW the night she disappeared. Using traffic cameras, the team traces the car to a farm outside Grange-over-Sands. The farm owner is Marcus Slater , a former foster carer. Leah lived with him briefly three years ago.