Review: Unforgotten (S1 E1/6), Thursday 8th October, ITV

When a skeleton is dug up from the cellar of a derelict building in Willesden, the first question asked is how old it is; but DCI Cassie Stuart (Nicola Walker) is the sort who would be determined to solve the case whatever its age. And yes, this is Nicola Walker in a leading role, which…