See the amazing story of how Casey and Brutus met and grew up to become best friends.
Casey returns to his wildlife hot spots, while Brutus and the other creatures come out of hibernation.
Casey ventures 'inside the pack' to create an intriguing profile of Yellowstone's apex predator.
When Grizzlies Attack video from the Casey and Brutus: Grizzly Encounters series on Nat Geo WILD.
Didn’t you get the Facebook invite? It’s Brutus’ 8th birthday party!
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