Anthony Armstrong

While driving one evening, Harold Pelham appears possessed and has a car accident. While on the operating table, there even appears to be two heartbeats on the monitor. When he awakes, Pelham finds his life has been turned upside-down: he learns that he now supports a merger that he once opposed, and that he apparently is having an affair. People claim they have seen him in places that he has never been. Does Pelham have a doppelganger - or is he going insane? (imdb)

A movie company wants to shoot a science-fiction film using an Army barracks as location, and its soldiers as actors. Of course, the Commander doesn't like it one bit, and persuades the crew to use a nearby haunted house instead.

In a pleasant variation on "The Ransom of Red Chief," elderly crook Harry Denton, when challenged to prove he is "not past it," decides to kidnap Sheila Farlane, the 16 year old daughter of a famous actor. When Harry loses his nerve, Sheila won't let him give up. Because she is bored and ignored by her egotistical father, she becomes the mastermind of the plot. (imdb)

Derwent dreams up an unbreakable alibi for a murder. Once the crime is attempted, it then falls to Pember and Brace of Scotland Yard to sort things out