Episode 10, "Passage at Arms" introduced Eric Pohlmann (previously seen in "The Second Mona Lisa") as Inspector Goron of the French Surete, who journeys to London to assist Colonel March in a murder case involving members of a French fencing team. Wealthy widow Mrs. Martha Pollard (Rachel Gurney) informs March about the heartless artist who left her on the brink of suicide, later turning up dead in an apparently successful suicide by sleeping pills. The competing fencing teams are questioned about a fictitious robbery, after her death is proved to be murder by smothering. Pohlmann's Goron is a droll delight (returning to the role three times), and the larger than usual cast makes for a multitude of suspects, including Laurence Payne, who went on to do 1958's "The Trollenberg Terror," 1959's "Ben-Hur," and Hammer's "Vampire Circus" in 1971, the last of his infrequent feature films. Another bit of minute trivia finds Gaylord Cavallaro, a very obscure actor, going to Hollywood and appearing in an episode of Boris Karloff's THRILLER, "Guillotine." Inspector Goron next appeared in the following episode, "The Headless Hat."