You can find this movie in the HORROR CLASSICS 50 MOVIE PACK.
Vincent Price plays Dr. Wells, but he isn't really the star. In fact, he's probably only on screen for a total of 20 minutes or so. Even better is the fact that grown up Darla Hood (Alfafa's girlfriend from the old LITTLE RASCALS comedy shorts) has a supporting role. And she looks almost the same as when she was a kid.
The real star is Agnes Moorhead (Samantha's mother in the old BEWITCHED TV series). She plays an Agatha Christie-type mystery writer spending the summer in a typical "old, dark house," complete with secret passages. (The house is very obviously a miniature in the long shots).
The story involves a masked killer known as "The Bat" who slashes his victims' throats using a glove with sharp claws on it.
Similar movies were common in the 1930s and 40s. In fact, there is a terrible Ritz Brothers comedy called THE GORILLA (also included in the HORROR CLASSICS 50 MOVIE PACK), which basically has the same plot except that the killer who is lurking around the secluded house is a "The Gorilla" instead of "The Bat."
THE BAT was originally a stage play, so most of the scenes take place in just a few rooms within the house and there is more talking than action.
Overall, this is a run-of-the mill thriller that looks like a cross between an old serial (like THE SHADOW or DICK TRACY) and a William Castle film (like THE HOUSE ON HAUNTED HILL). Castle was probably thankful that he had nothing to do with this movie.
