This fourth film version of the Mary Roberts Rinehart-Avery Hopwood stage chestnut The Bat is so old-fashioned in its execution that one might suspect it was intended as "camp" (though that phrase wasn't in common usage in 1959). Agnes Moorehead plays mystery novelist Cornelia Van Gorder, whose remote mansion is the scene for all sorts of diabolical goings-on. The "maguffin" is a million dollars' worth of securities, hidden away somewhere in the huge and foreboding estate. Vincent Price is seen committing a murder early on-but he's not the film's principal villain. Others in the cast include Gavin Gordon as an overly diligent detective, and former Our Gang star Darla Hood as a murder victim. The Bat was adapted for the screen by its director Crane Wilbur, himself a prolific "old dark house" scenarist and playright.
~ Hal Erickson, All Movie Guide