Kavanagh finds himself defending a left-leaning protester accused of stabbing a skinhead at a protest march. The accused claims that it was entirely his fault, but when he hears that his upper middle class girlfriend has shopped him to the police, he changes his story saying he was just being chivalrous and that it was his girlfriend who did the stabbing. The Kavanaghs continue their commuter marriage with Lizzie working in Strasbourg and it all proves to be a challenge to them both. Kate has left for Cambridge and Lizzie is pleased to hear that her tutor is the husband of one of her closest childhood friends. She is far less pleased when she learns that her daughter and the tutor are having an affair and Kavanagh himself simply blows a gasket.