Kate Humble challenges the residents of an ordinary street in the Scottish coastal town of Stonehaven to cut the amount of gas and electricity they use by 30% in just three weeks. Show more
First broadcast: on BBC Two HDLatest broadcast: on BBC Two Northern Ireland
Experts put overweight volunteers on diets tackling the specific reasons why they eat too much. In the final two months of the diet, the volunteers' bodies are fighting back. Show more
