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Casey Anderson is a man dedicated to preserving wildlife. He also has a special approach to understanding grizzly bears, which can be seen in the close, unique relationship he has with Brutus. ``Expedition Wild'' follows Casey as he travels 60 kilometers to Yellowstone National Park, documenting grizzly bears and mountain lions as they hunt for food to prepare for hibernation. Along the way, Casey learns behaviors that he can teach to Brutus and witnesses the daily struggle wild animals endure to survive.