Partners in Crime

When the British Secret Service asks them to take over the International Detective Agency, a suspected Bolshevik spy information drop, Tommy and Tuppence jump at the chance. Told to watch for blue letters with a Russian stamp and visitors mentioning the number 16, they nonetheless have time for a variety of cases as they pose as the agency's director and secretary. As an amateur private detective, Tommy takes inspiration from and impersonates other great detectives from crime fiction. While fulfilling their role for British Intelligence, they breeze their way through 15 other cases, solving murder mysteries, a jewel robbery, and rounding up gangs of smugglers and counterfeiters.