Moderately successful take on Agatha Christie's classic "And Then There Were None". Mario Bava fails to create much tension, mainly because the characters seems so blasè about the fact that they're getting picked off one by one, but he does shoot some standout corpse-discovery sequences, and the script hides several effective twists and red herrings. Very soft on the exploitation elements (gore and nudity). **1/2 out of 4.