This is a cracking little murder mystery that actually gives Eric Portman a chance to play a more substantial role, and to do it well. He discovers that his wife "Vivien" (Greta Gynt) has been having an affair with "Fenton" (Dennis Price) whilst he has been working abroad, so he contrives a plan to be rid of him with a perfect murder. As he carries out his dastardly deed, he discovers that his wife has more than one man on the go, and so sets up the hapless "Jimmy" (Maxwell Reid) to take the fall and to make his cheating missus suffer in the process. Policeman Jack Warner (who else?) soon suspects multiple rats and the story becomes more complex as Portman and Gynt play a great game of cat and mouse with each other, and with the police - before a clever, quite satisfactory, denouement. Arthur Crabtree keeps this tight, with good dialogue and a strong ensemble effort that is well worth a watch.