When Basil hears of hotel inspectors roaming Torquay incognito, he realises with horror that guests he has been abusing could easily be among them. Basil becomes increasingly obsessed with trying to determine which guests are hotel inspectors, but his suspects turn out not to be, to his frustration.

With Sybil in the hospital with an ingrowing toenail, a moose's head to hang up and some German guests arriving the next day, Basil has his work cut out for him. After an attempted fire drill goes wrong and Basil lands up in the hospital with concussion, he succeeds causing much offense to the German guests after finally escaping back to the hotel. This episode is the origin of the quote "Don't mention the war."