S6·E75 Episode 397 (Tue 18th Oct 1977)

Frank has an inkling that Joe is up to something but has no idea to what extent his secretive antics will effect his caravan plans. It's the Robblesfield Gala and Amos is there in his roving reporter role to cover the procession of vintage fire engines which Joe is part of. Amos then proceeds to ruin Joe's afternoon by telling him who may be his new next door neighbour - Henry.