The face of a new generation of aspirational adventurers and natural history filmmakers, 27-year-old Bertie Gregory takes viewers on an epic and nail-biting journey that pushes into the most spectacular and secretive corners of our wild world. This season will see Bertie braving the icy worlds of Antarctica in search of the biggest gathering of whales ever filmed and coming face-to-face with specialist buffalo-hunting lions in Zambia.