Finally, Stefan travels to China, finding out how the rapid pace of modernisation is changing the way people eat. He spends a day working at the Kung Fu fast food joint and samples the menu of a Beijing penis restaurant. He also attempts to shake off his Communist party minders to talk to one of China's poverty-stricken farmers.

Why are some people in the South Pacific eating themselves to death? In Tonga he finds the fattest people on earth - 91% are overweight - and goes kickboxing with the princess who is determined to whip her subjects into shape. In Fiji, he tries the local narcotic - cava - and slaughters a piglet for lunch.

In the third episode Stefan visits a camp for internally displaced people in war-torn Northern Uganda, to find out how people survive on meagre UN food rations. The UN gives them just 60% of their daily needs, so where do they find the rest? With rebels patrolling the nearby countryside, finding food is a matter of life and death.

Is there anything wrong with eating dogs? Stefan visits a farm where over 2,000 dogs are raised for their meat. He also picks up a few recipes from "Dr Dogmeat" and hears allegations that dogs are tortured to death. But when it comes to the crunch, will he tuck in?

This week food writer Stefan Gates cooks his way around Afghanistan, finding out how the country's reconstruction is going. He samples the testicles of the legendary fat-tailed sheep, known to the locals as the Afghan Viagra; narrowly avoids being blown up by abandoned Soviet scud missiles; and has dinner with a former Taliban commander.