Season: 1 | Episode: 4 | Length: 30m

Cold water swimmer Mary has no problem braving the icy waters of Lough Neagh every Sunday. How she looks doesn't bother her in the slightest, but what her extra weight is doing to her health very much does. Having piled on the pounds year on year for over two decades she is suffering more and more from increasing aches and pains. Mary is the heaviest she has ever been and she knows it's not good for her. Sympathetic to her plight, Stephen joins her in the kitchen as she samples healthy foods including scallops for the first time, courtesy of chef Michael Deane.