6/6 Tommy and Tuppence must come up with their most ambitious and risky plan yet.
5/6 Tommy and Tuppence turn their attention to their fellow occupants of Sans Souci to find N.
4/6 Tommy and Tuppence are enlisted to find a Soviet agent and a kidnapped scientist.
3/6 Tommy's cover is blown, and the violent criminal gang give him a job to do.
2/6 Tommy and Tuppence's search for the missing Jane Finn gets more dangerous.
1/6 Tommy and Tuppence Beresford are thrust into a web of international espionage.