Sid acquires some new tropical fish, and it's not long before he becomes obsessed with their welfare; much to the exasperation of his family. He becomes especially obsessed with caring for them, when he discovers one is 'with child.'
There are fun and games, and much confusion in the Abbott household, due to the word 'stripper' having different meanings. In addition, Sid does his best to make Mike move back home, when he finds Auntie Alice is coming to stay.
Sid hears from a solicitor, that he has inherited something from his old uncle Percy. The problem is; he needs to find an old photo of his uncle first. Will he find it, and what on earth will the inheritance be?
Sid gets a new secretary, and much to Jean's annoyance he keeps coming in late. Also, he is off with his secretary to Birmingham for something work-related. It's OK though, because she is frumpy, and the size of a Green Line bus. Or is she?
The Abbott family's neighbours, Trevor and Betty, ask Sid to keep an eye on their house while they're away. However, Sid doesn't do a very good job, and when they return, they are horrified when they discover what's in their house.
After 3 days of constant rain, the Abbott family's home springs a leak. They assume it's from a split water main or something of a similar nature, but the source of the leak comes from something none of them could ever have imagined.
Sid lands a large export order at work. Mike plans to have it put in the local paper, so takes Sid's photo filling in his pools coupon but the newspaper gets the headline wrong and chaos comes knocking on the door.