Hitchcock's "The Lady Vanishes" isn't exactly scary, but it does contain some patented Hitchcock supsense. It's also a weird little movie because it really feels like two movies in one. The first half is quite comedic, and once the lady vanishes, it turns into a whodunnit. It's on at 3:30am on Retroplex, but also seems to be available in its entirety--albeit broken up--on YouTube. Here are the first eight minutes or so.