Agatha Christie's Poirot - Season 2 - Eps 7: The Adventure of the Cheap Flat
A glamorous nightclub singer turned spy has stolen the US Navy's plans for a new submarine, and an FBI agent called Burt is in London to catch her. Burt dismisses Poirot as a gumshoe, and Poirot is likewise not impressed by the self-important G-man. Poirot is drawn into the case when it appears that the submarine plans will fall into the hands of the Fascist government in Italy unless they are recovered. When Poirot meets a young couple who've got an amazing bargain on a prime apartment, he sees a connection with the spy case.
About Agatha Christie's Poirot

Title: Agatha Christie's Poirot
First Air Date: 1989-01-08
Last Air Date: 2013-11-13
Status: Ended
Rating: 8.144/10 (from 492 votes)
Language: EN
Seasons: 14
Total Episodes: 70
Network: ITV1
Genres: Crime, Drama, Mystery
Production Companies: The Computer Film Company, Picture Partnership Productions, Carnival Films, LWT, GBH, A+E Studios, Agatha Christie Limited, Masterpiece, Granada Productions
Synopsis
From England to Egypt, accompanied by his elegant and trustworthy sidekicks, the intelligent yet eccentrically-refined Belgian detective Hercule Poirot pits his wits against a collection of first class deceptions.
Cast

David Suchet
Hercule Poirot