The award-winning crime drama returns for a landmark 20th series, starring Emilia Fox. Each story follows the dedicated team of forensic pathologists who try to work out how and why the victim died, often risking their own lives in the process. In this series an apparent suicide starts to look a lot more like murder, a young woman is dragged from a river in the same spot where her best friend mysteriously disappeared three years before and, in the final explosive story set in Mexico, Nikki finds herself in danger when she searches for the truth about the death of a former colleague.