This is a nearly line-for-line remake of Alfred Hitchcock's 1954 classic. It is drably shot (we're far from the Technicolor lushness of the original), and although the actors are good, especially Anthony Quayle as the wry Scotland Yard inspector, none of them really surpass their predecessors (the lover being the least interesting character in both versions). Yet the clockwork ingenuity of Frederick Knott's story comes through, and is more than enough to sustain it: I guess you can say it is foolproof. But if you DON'T know the story, better to start with the Hitchcock version and not get it spoiled by this one. **1/2 out of 4.