Undertone, Part 2

Martin, the sole eyewitness in the murder case, is found dead in suspicious circumstances. Threatened by an angry Bekir, Nuri grows increasingly desperate to find the missing drugs, with tragic consequences. Nikki helps grieving William come to terms with his daughter Alice's death and his missing baby granddaughter.

Under pressure from his wife Ellie, DI John Brooke finally comes face-to-face with his nemesis, drug dealer Bekir. However, Jack's growing frustration over DI Brooke's meddling in the case unearths a new line of enquiry.