Herr Flick and von Smallhausen, disguised as British airmen, are arrested by the Germans. Meanwhile, the real British airmen make their way along the canal. They've been told to look out for a goose with flashing eyes and smoke coming out of its tail. René and his staff row out to the estuary to make sure the British airmen get picked up by a waiting British submarine. The Germans have also rowed out to the estuary. The airmen get lost and the submarine leaves without them. (thetvdb.com)