Ken is keen to lay down some ground rules for Cuckoo in the Thompson house and proposes a family meeting. But getting his own way turns out to have devastating knock-on effects at Rachel's coming home party.

The family are off to see Lorna's dad Tony to celebrate his birthday. Ken is afraid that Cuckoo will send his beloved father-in-law to an early grave, but thanks to the intervention of a surprise feline guest, Cuckoo is a big hit. But events surrounding the cat put Ken in the doghouse.