S1, E6: Amy Jo, a superskinny undereater, spends five days in the `feeding clinic' with 38 1/2-stone Andy. Amy Jo may look perfect on the outside but her extreme exercise regime and diet, which restricts carbs, could lead to her body crumbling inside. Meanwhile, Andy must learn to survive on the limited calorie intake of Amy Jo. The aim is for them both to learn how they are affecting their bodies.