The coldest, driest, windiest and most daunting continent on the planet is Antarctica. This is home to Gentoo Penguins. When the chicks fledge and head to the water’s edge for the very first time, they can have little idea of what lies ahead. Not only do they have to navigate huge blocks of glacial ice to reach the open water where they can feed, but patrolling the bay are leopard seals. These are powerful, fierce predators and an encounter can be fatal for the young birds.

After Blue Planet and Dynasties we go behind the scenes of the BBC’s latest Nature blockbuster Seven Worlds, One Planet and join wildlife cameraman John Aitchison on location to discover how the dramatic story of the challenges facing these young penguins is filmed. This hugely ambitious series narrated by David Attenborough transports viewers around the globe to tell the remarkable stories of how the landscape and conditions of each continent have shaped the unique animal life found there.

Major wildlife series are some of the most ambitious programmes on television. Each six to seven minute sequence can take a year or two to plan and several weeks to film and edit. They are made by highly specialised teams which combine technical expertise with an artist's eye, natural history knowledge and the hardiness of old-time Antarctic explorers.

As we discover, it doesn’t matter how much preparation you do, the unexpected can and usually does happen and the Natural World can be thrilling, challenging and horrifying.