A decent little mystery story. Saw it again recently (Sept. 2011) and was struck by the difference between the true depth of this movie, which was filmed in 3D, and the layer effect of the mostly post-converted 3D movies hitting movie screens the last couple of years. Yeah, the 3D was pretty much a gimmick in “Dial M for Murder”, but Hitchcock understood something most folks making 3D films don’t; 3D can heighten motion away from the viewer as well as toward the viewer.