The life and death of amateur grizzly bear expert and wildlife preservationist Timothy Treadwell. Treadwell lived unarmed among the bears for thirteen summers, and filmed his adventures in the wild during his final five seasons. In October 2003, Treadwell's remains, along with those of his girlfriend, Amie Huguenard, were discovered near their campsite in Alaska's Katmai National Park and Reserve. They had been mauled and devoured by a grizzly, the first known victims of a bear attack in the park. (The bear suspected of the killings was later shot by park officials.) Founder of the organization Grizzly People, Treadwell devoted his life to the preservation of bears, co-authored a book with Jewel Palovak, "Among Grizzlies," and educated thousands of schoolchildren about bears. Treadwell also used his charisma and growing celebrity to spread the grizzly gospel, appearing on television shows including "The Late Show with David Letterman," downplaying the dangers of his encounters. But was Timothy Treadwell a passionate and fearless environmentalist who devoted his life to living peacefully among Alaskan grizzly bears in order to save them? Or was he a deluded misanthrope whose reckless actions resulted in his own death, as well as those of his girlfriend and one of the bears he swore to protect?