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On Running Wild with Bear Grylls: The Challenge, Bear Grylls is taking it up a level by teaching his celebrity guests essential survival skills that they'll have to master and then prove they can use in a high-stress situation. With more daring, epic challenges that span from the snowy peaks of the Canadian Rockies to the deserts of the Great Basin to the volcanic rainforests of Costa Rica, are these celebrities for "The Challenge"?