TV Nature - Season 30 Episode 6 : Fortress of the Bears Nature - Season 30 Episode 6 : Fortress of the Bears 7.8/10 by 39 users Alaska’s Admiralty Island is home to the largest concentration of bears in the world. At half the size of Yellowstone National Park, it manages to sustain four times as many grizzlies. The native Tlingít people call this island “Kootznoowoo,” which means “Fortress of the Bears.” Details Casts Posters Images Title Nature - Season 30 Episode 6 : Fortress of the Bears Alternative Titles Nature with George Page First Air Date 1982-10-10 Last Air Date 2025-10-29 Number of Episodes 683 Number of Seasons 44 Genres Documentary, Family, Networks PBS, Casts Plot Keywords , Episodes List Nature Season 30 :Episode 1 Radioactive Wolves Radioactive Wolves 2011-10-19 Consistently stunning documentaries transport viewers to far-flung locations ranging from the torrid African plains to the chilly splendours of icy... Nature Season 30 :Episode 2 The Animal House The Animal House 2011-11-02 Consistently stunning documentaries transport viewers to far-flung locations ranging from the torrid African plains to the chilly splendours of icy... Nature Season 30 :Episode 3 Jungle Eagle Jungle Eagle 2011-11-09 Consistently stunning documentaries transport viewers to far-flung locations ranging from the torrid African plains to the chilly splendours of icy... Nature Season 30 :Episode 4 My Life as a Turkey My Life as a Turkey 2011-11-16 Consistently stunning documentaries transport viewers to far-flung locations ranging from the torrid African plains to the chilly splendours of icy... Nature Season 30 :Episode 5 Kangaroo Mob Kangaroo Mob 2012-01-11 Consistently stunning documentaries transport viewers to far-flung locations ranging from the torrid African plains to the chilly splendours of icy... Nature Season 30 :Episode 6 Fortress of the Bears Fortress of the Bears 2012-01-25 Consistently stunning documentaries transport viewers to far-flung locations ranging from the torrid African plains to the chilly splendours of icy... Nature Season 30 :Episode 7 Raccoon Nation Raccoon Nation 2012-02-08 Consistently stunning documentaries transport viewers to far-flung locations ranging from the torrid African plains to the chilly splendours of icy... Nature Season 30 :Episode 8 Ocean Giants: Giant Lives Ocean Giants: Giant Lives 2012-02-22 Consistently stunning documentaries transport viewers to far-flung locations ranging from the torrid African plains to the chilly splendours of icy... Nature Season 30 :Episode 9 Ocean Giants: Deep Thinkers Ocean Giants: Deep Thinkers 2012-02-22 Consistently stunning documentaries transport viewers to far-flung locations ranging from the torrid African plains to the chilly splendours of icy... Nature Season 30 :Episode 10 Ocean Giants: Voices of the Sea Ocean Giants: Voices of the Sea 2012-02-22 Consistently stunning documentaries transport viewers to far-flung locations ranging from the torrid African plains to the chilly splendours of icy... Nature Season 30 :Episode 11 River of No Return River of No Return 2012-04-18 Consistently stunning documentaries transport viewers to far-flung locations ranging from the torrid African plains to the chilly splendours of icy... Nature Season 30 :Episode 12 The White Lions The White Lions 2012-05-09 Consistently stunning documentaries transport viewers to far-flung locations ranging from the torrid African plains to the chilly splendours of icy... Nature Season 30 :Episode 13 Cracking the Koala Code Cracking the Koala Code 2012-05-16 Consistently stunning documentaries transport viewers to far-flung locations ranging from the torrid African plains to the chilly splendours of icy...