Saville Row to the Rescue (S01E03)

The Colonel, the Captain, and Herr Flick are pretending to be onion vendors while the Jewish tailors in London are busy altering the German uniforms. Meanwhile, Michelle brings a bottle of nitro-glycerin cleverly disguised as Bols Gin, intending to stash it in the café until it's time to retrieve it later that night for a plot to blow up a German railway.