The Rushes' receive threatening letters from the Electricity Board and Gas Board, and Muriel suggests using foam granules to insulate the attic. Susan considers having herself tattooed, and Duncan informs Dudley that Barney the Bionic Bulldog is to be replaced by a new character created by the managing editor's wife; Gertie Guitar, a little girl who wants to become a rock star. Then Jacqui has her handbag containing two tickets for the Globe Theatre stolen in the ladies' toilets at Harrods, and her father decides to play detective to catch the culprits.