English detective dci alan banks returns in this fourth series of the popular crime drama with three new, original stories inspired by peter robinson's bestselling novels. What will survive dci banks struggles to cope with the sudden death of his mother, as he investigates the murder of a young estonian woman and the disappearance of her drug dependent sister. Buried banks must navigate difficult emotional territory when the body of an eminent lawyer is washed up in an underground river and he suspects a member of her grieving family is responsible for her death. Ghosts the body of a university student is found dumped in a ravine. His friends claim he was a model undergraduate, but officers annie and ken soon discover that he had a double life manufacturing ecstasy. Running time 268 minutes region region 2 this dvd may not be viewable outside europe. Read more about dvd formats. Release date 15 aug. 2016