It’s always a joy to come back to this one. Hitchcock puts you in the same uncomfortable seat as Jimmy Stewart, spying on his neighbours, constantly questioning whether he should look away while simultaneously being unable to.
The characters develop a nervous sense of humour as the story moves on which is one of the better things about the screenplay. It’s funny but the jokes just betray everyone’s nerves and serve only crank up the anxiety.
One of Hitchcock’s greatest works.