Second episode of the detective drama based on the novel by Lynda La Plante. After missing a promotion, it seems that Langton is conducting his own investigation into his trusted team. Meanwhile, Travis is determined to uncover the secrets that Amanda's old housemates hold. When one dies of a drug overdose, the team begin to hunt down the dealer, hoping to find answers. With Kelly Reilly, Ciaran Hinds, Shaun Dingwall, Michelle Holmes, and Celyn Jones. AD SUB