Mario Bava's rarely seen shocker is an unofficial reworking of Agatha Christie's "Ten Little Indians," set on a Mediterranean Island where a wealthy businessman invites his bourgeois friends to witness the unveiling of a new formula created by a chemist acquaintance. Mysterious deals and sexual intrigue ensue, but when guests start turning up dead, there's no telling who's the murderer. Ira von Furstenberg, William Berger, Maurice Poli stars. 81 min. Widescreen (Enhanced); Soundtrack: English (dubbed); audio commentary. Dubbed in English.