The talisman is missing - Jake and Felix are at loggerheads as to where it is. Could Saskia be to blame? Meanwhile, Andy meets a cloaked figure while trying to find a way out of negative space.

Foyle is drawn into the world of corrupt Nazi businessmen when a university professor is found murdered in a London park. When it transpires the victim was working as a translator in Nuremberg, the detective realises there are powerful people trying to conceal secrets from the Second World War. Meanwhile, Sam (Honeysuckle Weeks) volunteers for a risky undercover job, despite being pregnant. Guest stars include John Mahoney (Frasier), Jaime Winstone (Mad Dogs) and Nigel Lindsay (Four Lions).

Alan finally lets Celia into his secret about Gary but is saddened when Celia punishes Caroline on her wedding day for his mistake.