These comments are based on watching both parts of 'The Black Tower' not just the second.
This episode sees DCI Dalgliesh heading to the coast to visit old friend Father Michael; unfortunately when he arrives he learns that his host had died two weeks previously. Fr Michael had worked at the nearby Toynton Grange care home; while he had apparently died of natural causes his wasn't the only recent death there... a cantankerous old man had apparently committed suicide by wheeling himself over a cliff (thanks to the prologue viewers know he was pushed by an unseen assailant). Dalgliesh has his suspicions but the local police inspector isn't very helpful; thankfully Sergeant Kate Miskin, who has her own suspicions is happy to help investigate. Not surprisingly there will be more deaths as the case progresses.
I enjoyed the first of Channel Five's adaptations of P. D. James's stories and happily enjoyed this one just as much. The setting is classic murder mystery; remote, rural and effectively set in a closed community... suspects and victims are all living at the care home. This creates a sense of claustrophobia that is heightened by the fact that several residents have mobility issues. The number of suspects and motives should keep the viewer guessing till the reveal at the end. The cast does a solid job; Bertie Carvel continues to impress as Dalgliesh and guests Steven Mackintosh and Carlyss Peer stand out as the intense Brother Wilfred Antsey and Sgt Miskin respectively. Overall another fine story; it is just a pity we only have one more to go... hopefully further series will be commissioned soon.