When Caroline is planning a dinner party for husband John and his friends from London, her attempts to enlist Rosie to help lead her to mistakenly think she is being invited, resulting in an extremely awkward evening when travel troubles result in Sal, the Vicar and Suzie being the only other guests at the party. Meanwhile, Jock's attempt to apologise for an unfortunate remark gives Sal yet another problem.
Sal runs a surgery from her house for elderly patients who don't want to go to the doctor. Jock, who is in charge of the building works, gets the idea, thanks to Rosie, that Sal is a prostitute because so many men are visiting her. He tells James, who fears it will ruin his chance of running for M.P. He is no happier when he learns that his mother is dispensing medicine, though Yasmeen takes it well. All is cleared up apart from the matter of the vicar, who came to Sal for sleeping pills, nodded off overnight and is discovered minus his trousers.
