Enjoyable if fairly predictable whodunnit that is elevated by a typically marvellous Alastair Sim performance. It has its smaller, cleverer moments and a good sense of humour (Sim spinning around in an office chair while interrogating Trevor Howard would amuse me for hours) and is a generally pretty good way to spend an hour and a half.
Alastair Sim is captivating in his debut film role as Inspector Cockrill in this clever English crime mystery. The cinematography is ingenious with marvelous use made of shade and light to intensify the creepy mood and atmosphere particularly in the early scenes.
Only modestly entertaining wartime murder mystery is talky and stodgy in that very British way. There is some great black and white cinematography that makes for a handful of effective moments, and a reliably colorful performance from Alastair Sim adds some much needed spark - but the story never rises above the usual old-fashioned intrigue. A well-made film, but not particularly memorable.