Not a bad Hitchcock style mystery/thriller at all. It's nothing major and it sort of goes through the motions setting up the rather familiar premise, but once film legends Bogart and Greenstreet start playing their little cat and mouse games, it becomes genuinely suspenseful. I found myself enjoying it quite a bit, though Bogart's benevolent change of heart regarding his obsession Alexis Smith made little sense. (This is compensated for, however, by one of those surprise endings that you sort of see coming but are surprised by anyway.)
