However when an officer from GHQ arrives to take command over from him , implementing much the same policies as he had , Mainwaring is himself outraged .
The episode ends with Mainwaring being locked out of Mainwaring 's own office .
However when an officer from GHQ arrives to take command over from him , implementing much the same policies as he had , Mainwaring is himself outraged and the episode ends with him being locked out of his own office .