Another three two-part episodes from the ITV drama series based on the crime novels by Peter Robinson. Stephen Tompkinson stars as the tenacious and stubborn Detective Chief Inspector Alan Banks, who unravels a string of disturbing murder mysteries aided by his feisty and ambitious young assistant, DS Annie Cabbot (Andrea Lowe) and DI Helen Morton (Caroline Catz). In this instalment the trio investigate the murder of a drug dealer who died near a shrine to a teenager's suicide. The episodes are: 'To Burn in Every Drop of Blood: Part 1', 'To Burn in Every Drop of Blood: Part 2', 'A Little Bit of Heart: Part 1', 'A Little Bit of Heart: Part 2', 'Undertow: Part 1' and 'Undertow: Part 2'.