Nature - Season 33 - Eps 6: Invasion of the Killer Whales
A shift of power is taking place at the top of the world. The Arctic is undergoing a dramatic change, and with this change one iconic Arctic hunter may soon have to give way to another as solid ice turns to open sea. The polar bear, once king of the North, needs ice to stalk its prey. Killer whales, or orca, on the other hand, are unable to hunt in an ocean locked in ice.
About Nature

Title: Nature
First Air Date: 1982-10-10
Last Air Date: 2025-04-16
Status: Returning Series
Rating: 8.1/10 (from 35 votes)
Language: EN
Seasons: 44
Total Episodes: 678
Network: PBS
Genres: Documentary, Family
Production Companies: Thirteen, Coneflower Films Studios, Trebitsch Produktion International GmbH, Rubin Tarrant Productions
Synopsis
Consistently stunning documentaries transport viewers to far-flung locations ranging from the torrid African plains to the chilly splendours of icy Antarctica. The show's primary focus is on animals and ecosystems around the world. A comic book based on the show, meant to be used an as educational tool for kids, was briefly distributed to museums and schools at no cost in the mid-2000s.