one thing that movie taught me..
you can always mess around with peoples' wives and rest assured that the husband won't do anything about it anyway, even if he tried he will get into trouble and you will take the wife anyway. wow life sucks.
I wonder why isn't there a law to prevent infidelity.
and the detective was like "yo Mark I'm gonna prove he's guilty so you can bed his wife freely now OK?"
One of Hitchcock's finest though.
Nobody panics when things go "according to plan." Even if the plan is horrifying!