Michael Mosley finds out why fizzy drinks make you eat more, Dr Zoe Williams investigates whether caffeine boosts your physical performance, and surgeon Gabriel Weston looks into the new artificial pancreas that could transform life for diabetics.

The team continue to investigate marine life. We also go to Atlantis, a deep sea research vessel, as it launches a sub that will help assess the health of the deep ocean.

Ben Fogle travels round the world to visit people who have given up the rat race.

Deep in Alaska, the primal way lives on. Fight the freeze, brave the wild, hold on to your sanity. And winter is no wonderland when temperatures plummet far below zero. This series follows the drama and hardships experienced by Alaskan households in different corners of this merciless territory as they battle to survive, thrive, and live life on their own terms.

The actress visits important places in the spice trade.

Footage capturing the destruction and chaos caused by severe weather conditions, featuring first-hand accounts from those who have survived such events.

To capture footage of the volcano's molten heart, the aerial team must deal with ferocious winds and clouds of volcanic gas - this is aerial filming at its most extreme. Meanwhile, the cave team is dropped close to the summit.

Gregg Wallace and Cherry Healey hit factory floors across Britain for a snoop around their supersized production lines. What are the secrets behind our supermarket staples?