The NHS's largest children's hospital, Alder Hey in Liverpool has a problem: the food. The children won't touch it, and their road to recovery is suffering as a result. Enter Heston Blumenthal, tasked with a real mission impossible: to persuade hospital bosses and staff that processed fast food straight out of a packet isn't the way forward, and get the kids to eat his new food creations, which include protein-packed worms on pizza.

Heston tries to transform the food at one of the UK's biggest cinema chains, Cineworld. His challenge: to inject fun and excitement into the movie experience by overhauling the snacks on offer. Heston believes that a visit to the cinema should be a multi-sensory experience which tickles smell and taste not just sound and vision. And he wants the food on the cinema menu to reflect the action on screen.

Heston works with British Airways to revolutionise airline food. But with no kitchen, no pans, no sharp knives, and no naked flames, Heston soon realises that cooking gourmet food in a metal tube at 37,000 ft is no mean feat.

Heston boards the nuclear-powered Royal Navy sub, HMS Turbulent, to shake up the sailors' food. It's not long before Heston realises he's got a big job on his hands: the men are out on patrol for 90 days at a time, and they're eating three stodgy meals a day. And with so little opportunity for exercise on board, it's not a healthy diet - especially when the submariners' jobs require very high levels of concentration.