"The Missing Guest" is one of 4 film versions of this story about a "haunted" manor and a room where people go to sleep and disappear or die. This is the only version I've watched so far, and I found the plot semi-predictable: i.e., the solution to the crime of the present is more predictable than the solution to the crime of the past. But this is almost as much a comedy as it is a mystery, with two ex-crooks-turned-private-investigators getting pretty big roles, and being quite funny at times ("My brain works best when it's empty!"). The production is very, very cheap, but there is some interesting use of subjective camera movements at one or two points. And Constance Moore makes a cute leading lady. ** out of 4.
Review of The Missing Guest
