The first 30 odd minutes of this film is so slow but it is setting up all the characters in the film. Not just Jimmy Stewart watching Raymond Burr's apartment. You have the young married couple, the older couple with a dog, the dancer who seems to be with a different guy each night while her husband is away in the service. The lonely heart lady in the lower apartment and the piano player in the top apartment. They all have stories to tell which are interwoven with the main murder plot.
I'd seen this film before but couldn't remember anything about it. After it was finished I thought, yes, that was OK. But I've been thinking about it ever since. Not many films do that to me. Raymond Burr plays the villain so well and he only has a couple of lines in the whole film. It's just that hulking presence on film is enough.
Jimmy Stewart is one of my favourite actors from that era and he's great in this. That look he gives when he first start looking through the binoculars. He knows it's not right spying but like a car crash, he can't look away.