BBC Earth

Gregg Wallace is in Essex at an enormous cereal bar factory, which produces 400,000 fruit- and nut-packed treats a day. Gregg follows production from the arrival of two tonnes of macadamia nuts all the way through to dispatch.

This journey runs from the Mexican border at San Diego, following the Californian coast north to the city of San Luis Obispo,aboard the aptly named Pacific Surfliner. On the way, there's a stop in Carlsbad, a city that originated from a snackbar.

Sue is out to hunt caribou. Ricko travels to a natural hot spring. Jessie moves to Brushkana. The Hailstones build a wall tent and go fishing.

Ben journeys to North Africa, to live with American widow Maryanne on the farm she's built on the edge of the Sahara. He discovers why she swapped her city abode for a simpler and tougher way of life in the Egyptian desert.

The spy creatures explore the islands of the Southern Seas. In these isolated places, far from the mainland, some of the most unique animals on earth have evolved. On the Galapagos Islands, spy iguana joins marine iguanas as they bask on ancient lava, before cliff-diving into the sea below. Lava ...

Gregg Wallace is in Essex at an enormous cereal bar factory, which produces 400,000 fruit- and nut-packed treats a day. Gregg follows production from the arrival of two tonnes of macadamia nuts all the way through to dispatch.

Power through the Peak District at full steam, pulled by the Royal Scot, one of the finest locomotives ever built. In the Peak District, climb the famous Stanage Edge and meet the man who dedicated his life to restoring heather to the moors, local farmer Geoff Ayre, aka the heather doctor.

Sue builds a drainage system under her runway. Ricko explores old family land. Jessie sets up camp in Brushkana. The Hailstones go boating.

Ben travels to an island off the New Zealand coast to meet a man who gave up a promising career in medicine to live off grid in a secluded forest. Ben's host is an escapee from the Iran-Iraq war who has embraced a rugged new life in the bush.

The Spy Creatures travel to the lands of ice and snow beyond the Arctic and Antarctic circles. From penguin chicks to elephant seals, wolf cubs to polar bears, showcasing the hardiest and most charismatic animals in the polar world. In the Southern Ocean, the island of South Georgia is home to 20...

In Wigan, Gregg Wallace visits an enormous soup factory, which produces two million tins a day. He follows the production of vegetable soup, from a pea harvest in Yorkshire right through to the finished soup going into cans and being dispatched.

Professor Brian Cox joins the Jet Propulsion laboratory team as they navigate the rover's every move across the floor of the Jezero crater towards the remains of an ancient river delta that may contain the evidence of ancient life on Mars.

Brutal storms threaten the lives of those living in the Arctic as they enter Dark Winter.

The Amazon is where Ben's own adventures began. Now he is back to meet Chris, a Scotsman who has made his home in the most remote area of this jungle. The duo go hunting for wild pig and fishing for piranha, and visit a village Chris helped to build.

In Arkansas, two storm chasers help warn people that a tornado is barrelling towards them. In Idaho, a daredevil adventurer decides to swim beneath a frozen lake - but his helpless girlfriend watches on as the wild stunt goes horribly wrong.

Romesh crosses the border from Uganda into Rwanda, a country he feels has been defined by Westerners almost entirely by the 1994 genocide. Rom's affable guide is performance artist, genocide survivor and peace activist Hippo.

Power through the Peak District at full steam, pulled by the Royal Scot, one of the finest locomotives ever built. In the Peak District, climb the famous Stanage Edge and meet the man who dedicated his life to restoring heather to the moors, local farmer Geoff Ayre, aka the heather doctor.

Brutal storms threaten the lives of those living in the Arctic as they enter Dark Winter.

The Amazon is where Ben's own adventures began. Now he is back to meet Chris, a Scotsman who has made his home in the most remote area of this jungle. The duo go hunting for wild pig and fishing for piranha, and visit a village Chris helped to build.

Professor Brian Cox joins the Jet Propulsion laboratory team as they navigate the rover's every move across the floor of the Jezero crater towards the remains of an ancient river delta that may contain the evidence of ancient life on Mars.

In Arkansas, two storm chasers help warn people that a tornado is barrelling towards them. In Idaho, a daredevil adventurer decides to swim beneath a frozen lake - but his helpless girlfriend watches on as the wild stunt goes horribly wrong.

A look back at some of the best moments from the series. Steve races a cheetah, rescues a king cobra and shares some of those rare times when things go wrong.

Brutal storms threaten the lives of those living in the Arctic as they enter Dark Winter.

The Amazon is where Ben's own adventures began. Now he is back to meet Chris, a Scotsman who has made his home in the most remote area of this jungle. The duo go hunting for wild pig and fishing for piranha, and visit a village Chris helped to build.