The crackling sexual currents in London University's forensic pathology department flow in new directions in five gripping, two-part episodes of the award-winning BBC crime drama. Will Harry's affair with a former colleague cloud his judgment when her husband is murdered? Will Nikki's affair with a South African businessman keep her in Cape Town? Tangled passions and deceit end in a pool of blood for the wife of a wealthy banker, and in women's murders that only DNA can finally solve.