It's a testing time for everyone: Joanna and Harriet are each convinced they're pregnant, Martin sits his exams for the hundredth time, and Mac surreptitiously attends an interview for a promotion

Martin loves Caroline. Caroline loves Mac. So does Sue White. Mac has a girlfriend. Statham loves Jesus, or is it the chaplain? Joanna loves Lyndon. And Guy loves Guy but he pretends to love Caroline.