Sardinia, Italy - (L to R) Armie Hammer and Bear Grylls climb a cliff for National Geographic's RUNNING WILD WITH BEAR GRYLLS. (National Geographic/Jeff Ellingson)
Norway - Bear Grylls and Channing Tatum fly away in a helicopter for National Geographic's RUNNING WILD WITH BEAR GRYLLS. (National Geographic/Ben Simms)
(L to R) Bear Grylls and Joel McHale clean a dead bird for a snack in National Geographic's RUNNING WILD WITH BEAR GRYLLS. (National Geographic/Ben Simms)
Horseshoe Bend, Ariz. - (L to R) Bear Grylls and Dave Bautista turn a log into a ladder for National Geographic's RUNNING WILD WITH BEAR GRYLLS. (National Geographic/Ben Simms)
Månafossen, Norway - (L to R) Bobby Bones and Bear Grylls battle the rain for National Geographic's RUNNING WILD WITH BEAR GRYLLS. (National Geographic/Ben Simms)
Panama - (L to R) Bear Grylls and Zachary Quinto deep in the Panamanian jungle for National Geographic's RUNNING WILD WITH BEAR GRYLLS. (National Geographic/Ben Simms)
Panama - (L to R) Bear Grylls and Zachary Quinto deep in the Panamanian jungle for National Geographic's RUNNING WILD WITH BEAR GRYLLS. (National Geographic/Ben Simms)
Panama - Brie Larson (R) watches as Bear Grylls preps a coconut in National Geographic's RUNNING WILD WITH BEAR GRYLLS. (National Geographic/Ben Simms)
Tamron HallTamron Hall, Bear GryllsBild: © MG RTL D / © 2017 NBCUnive
