The Congo rainforest covers the very heart of Africa and is a dynamic and pulsating habitat, packed with life; from the competitive centre of the forest to the open edge of the Atlantic Ocean, this is all about carving out space in a crowded world.

RATED 14+. The crew of Southern Airways Flight 242 find themselves in a violent storm when rain and hail pelt the aircraft; when the windshield shatters and both engines give out, the pilot has no option but to try to land on a highway in Georgia.

Steve is on a quest to find out about London's historic alternative coinage and return an ancient trading token to its original home, while Johnny gets to grips with the murky world of tobacco.

Starting with our origins in Africa 70,000 years ago, trace the story of our nomadic ancestors as they spread out around the world and settled down to become the first farmers and townspeople.

Take a look at our guts and learn why women and cooking vegetables, rather than men and hunting, enabled one of our greatest evolutionary leaps.