Sapphire - 1959 - 6/10
Scotland Yard investigates murder of young girl, dumped on Hampstead Heath.
Soon enough, they realize she was not white, but was high yellow, and passing.
While digging for suspects and motives, detectives encounter racism, implied, overt or smiling.
That twist seems mild now, but was undoubtedly controversial in its day.
Well cast, well acted procedural - and yet - we never know who Sapphire was, as an individual.