I think that this was filmed in Jersey.The island promoted as the Honeymoon Island.The plot is fairly standard blackmail plot with a few entertaining twists.There is one real moment of suspense.Are Merton Park about to splurge the cash by crashing a car over a cliff.Well no they are not.We merely hear the sound!The police inspector is played by Phillip Stone,one of Kubricks favourite character actors.

This Edgar Wallace mystery is aided by some surprisingly effective performances, particularly Dudley Foster's compelling study of the quiet-spoken, vengeful doctor and Brian Haines as a totally unsubtle inquiry agent. Also the film is often directed with an astonishing degree of visual flair. It's also smartly edited and the director makes fine use of his actual locations. In fact, the only really disappointing aspect of the movie is its pedestrian music score as composed and conducted by Bernard Ebbinghouse. (Although the film's credits actually read, "Title music by Michael Carr", this is incorrect. For once in the series, Carr's familiar Edgar Wallace signature tune is NOT played here!

A fairly good thriller in the Edgard Wallace Mystery series, half TV half classic UK crime movie. The tale of a chief surgeon who rents a private eye in order to follow his wife. And the private eye reports that the wife in question has a lover, he brings the husband the recordings of the two unfaithful lovers. Then the surgeon plans to kill his wife's lover. In this proceedings, he poisons him before leading the surgery operation...But, in the meanwhile, the private detective is back and tries to blackmail his client, because he has understood that the surgeon wants to get rid of his wife's lover. And this man has a wife too...A wife who is in touch wit the private eye...Intriguing story around blackmail and murder. A classic story but worthwhile.