LeClerc's brother Ernest has swapped places with him, and is now the resident pianist and object of Madame Fanny's affections.
The Gestapo plan to infiltrate the Resistance by posing as British Airmen, for which they undertake English language lessons via gramophone, with interesting results.
Madame Fanny discusses her wedding plans with Edith, while Helga tries to seduce Herr Flick with an eye to marriage.
Herr Flick and the German officers turn their attention back to the paintings (and their forgeries), the cuckoo clock, and the stolen gold.
Madame Fanny and Ernest's wedding provides the ideal cover for Michelle's latest scheme to get the British Airmen back to England.