The Black Toweris the fifth in PD James’s series of detective novels featuring Commander Adam Dalgliesh. It is set in Dorset, where Dalgliesh goes to visit an old friend in a care home, only to find himself investigating a series of alleged suicides there.
It was turned into a 6-part mini-series by Anglia Television in 1985, with Roy Marsden playing Dalgliesh. The mini-series was mostly filmed at Clavell Tower on the Isle of Purbeck. It is being filmed again by Channel 5 as part of its forthcoming series Dalgliesh, starring Bertie Carvel in the title role.