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Bear Grylls takes actor Zac Efron on an adventure-filled trip into the wilds of the Catskill Mountains.

Bear Grylls takes Ben Stiller on an epic adventure of survival through the mountains of Scotland's Isle of Skye.

Hollywood superstar Channing Tatum and Bear Grylls chopper into the wilds of the Sierra Nevada for a high altitude, high stakes adventure.

Comic and actor Tom Arnold heads into the wilds of coastal Oregon with Bear Grylls for an ultimate lesson in survival.

MSNBC anchor and reporter Tamron Hall steps outside her comfort zone to explore the beautiful but brutal desert of southern Utah with the legendary Bear Grylls.

Bear Grylls takes NFL Hall of Famer Deion Sanders into the wild to face his toughest opponent yet: the hills of the desert southwest.