Cast in Order of Appearance

Who killed Marius Steen, the theatrical tycoon with a fortune to leave to his young mistress Jacqui? And who killed Bill Sweet, the shady blackmailer with a supply of compromising photographs? Charles Paris, a middle-aged actor, who keeps going on booze and women, takes to detection by assuming a variety of roles including that of a Scotland Yard Detective-Sergeant. The results are both comic and dramatic. As the mythical McWirther of the Yard, he actually precipitates the crime; as one of the blackmailer's victims he finds himself in bed with the blackmailer's wife; as a small part player in a horror film (The Zombie Walks), he gets shot at by the murderer. And he arrives at the solution by way of the petrol crisis and an abortive attack of German measles.