Emotions run high in the feeding clinic as Dr Christian Jessen pushes calorie-counter Lucy Lee and buffet-binger Leighton Davies to the limit.

Lucy weighs in at just under eight stone. She became addicted to dieting after shaking off her post pregnancy weight, and is terrified she'll end up too ill to care for her child. Trying to wolf down Leighton's gigantic portions of take away food brings all of her anxieties rushing back to the surface.

Twenty three and a half stone Leighton breaks down when he receives a video message from the morbidly obese Edward Ledesema in Los Angeles, urging Leighton to wake up to the true dangers of his deadly diet.

Anna Richardson continues her investigation into getting the perfect body. Desperate for smaller, firmer looking breasts, she meets a top glamour model who gives her some secret tips of the trade.

The show also takes a glimpse into the lives of three women and one man in the grip of the mental illness anorexia nervosa. This time the quartet go to supermarket shopping for a lunch consisting of the high calorie ingredients they would normally avoid. But this proves a step too far for Ashley.