As a long time fan of John Dickson Carr, I was pleased to come across this episode on Matinée Classics. Although I've seen many of them, I'm not a fan of Boris Karloff's horror movies but based on interviews with him and what I have read about him it seems as though he was quite a kind and cultured man. While vacationing on the shore, Colonel March is approached by a young boy who asks him to investigate the loss of his small rubber ball. Soon on the pier they witness a man clutching his chest and falling into the sea. March who heads Scotland Yard's Department of Queer Complaints finds certain evidence suggesting that the man's death may not have been from natural causes. The solution to this mystery was pretty interesting but what I really liked about this episode was the interaction between Colonel March and the boy. March was such the wise grandfather figure in these scenes. I liked Karloff better as the wise grandfather than as Fu Manchu. There is another episode of this available on Internet Archive and other than that, this series appears to be unavailable – which is a shame as Karloff is so likable in this series.