8. Sam vs Michael

2014 - Season 7

7. Joseph vs Rebecca

2014 - Season 7

In the Feeding Clinic, Joseph, a 22 and a half stone honey nut cereal addict, swaps meals with Superskinny breakfast-skipping runner Rebecca who weighs in at just seven and a half stone. During the diet swap, Rebecca breaks down after reading a letter from her dad, realising just how worried he is about her health, while Joseph is horrified when Dr Christian shows him the huge amounts of salt and sugar in his cereal packed diet. Before Rebecca and Joseph enter the feeding clinic, Dr Christian sends Joseph to Arkansas, America to meet an overweight internet sensation: 37 and a half stone, Boogie. Although Boogie makes fun of his figure in online comedy videos, he's deeply distressed at his size and is devastated he won't be able to dance with his bride on his wedding day. Plus, former anorexia sufferer and journalist Emma Woolf concludes her two-part investigation into the prevalence of eating disorders among athletes as she meets a triathlete who conquered both anorexia and bulimia.

6. Laura vs Jake

2014 - Season 7

In the Feeding Clinic 24-stone chocaholic Laura meets superskinny energy drink addict Jake, who is only eight stone. Laura goes to Missouri, in the US, to meet Betsy, whose life has been destroyed by overeating, and is so heavy her doctor suggested she be weighed at the local zoo! In Las Vegas, Dr Christian sees first hand the ravages of diabetes, as he meets a woman who lost her leg to the condition. And Emma Woolf begins a two-part investigation into the prevalence of eating disorders among athletes and dancers.

5. Lauren vs Shelby

2014 - Season 7

Young mums Lauren and Shelby meet in the Feeding Clinic. Lauren is a fat and sugar junkie who weighs 28 stone, while toast nibbler Shelby is just over six stone. In Las Vegas, Dr Christian visits a residential weight loss camp which aims to get its obese residents from fat to fit. And Emma Woolf continues her investigation into eating disorders, meeting a woman with cerebral palsy who reveals the shocking reality of what it's like to be disabled and suffer from anorexia.

4. Charlene vs Mick

2014 - Season 7

This time in the Feeding Clinic takeaway fan Charlene Shattock meets sugary tea addict Mick Wickes. And Emma Woolf meets Valeria Levitin, who has been battling anorexia for over 20 years.

3. Jackie vs Beth

2014 - Season 7

Thirty-four-year-old junk food addict Jackie Kenworthy meets 70-year-old great grandmother Beth Edwards, who lives on a diet of egg and toast. Jackie visits Salem, North Carolina, to meet Nikki, who weighs in at over 51 stone. Dr Christian continues his tour of Las Vegas, the capital of excess, to investigate its obesity crisis. And Emma Woolf looks at dedicated hospital in-patient care for people with eating disorders.

2. Joanne vs Guy

2014 - Season 7

Thirty-four-year-old serial dieter Joanne Allen, who weighs in at 19 stone and five pounds, meets 20-year-old fizzy drink addict Guy Sykes, in a swap that's packed with drama and tears. Joanne travels to the US to meet 37-and-a-half stone Khalila Morse, to share tips and stories about how their weight inhibits their sex lives. The show tours the residential districts of Las Vegas, where a lack of supermarkets, fresh fruit and veg, and one of the worst exercise rates in America, has created a city that's fast becoming the county's capital for bariatric surgery. Dr Christian witnesses one of the most extreme and shocking weight-loss procedures on the planet: he meets a man who eats as much as he likes and then fits a tube directly into his stomach to pump out the food. And recovered anorexic and journalist Emma Woolf meets the family of Jay Taylor, who lost her battle with anorexia in August 2013.

1. Gary vs Amy

2014 - Season 7

In the feeding clinic this time is Caribbean chef Gary Tomlin, who tips the scales at 21 stone eight, and Amy Simons, whose meal-skipping bad habits see her weigh in at eight stone three. Before they swap diets, Gary goes to America for some shock therapy, where he meets 36-and-a-half stone Nary, who is paralyzed from the waist down, has to be washed in the garage with a hose, and has terrible open wounds that struggle to heal. Dr Christian visits Las Vegas, the heart of where it's all going wrong with food in the USA, and joins the Fat Interceptor Team, who are battling to save the city's sewers from a tidal wave of fat. And former anorexia sufferer Emma Woolf continues her investigation into the hidden world of eating disorders as she uncovers the secret world of pro anorexia websites