America s National Parks Networks: National Geographic (US) Season One, Episode 3 Big Bend Original Air Date: Aug 31, 2022 (United States) 45 min, PGTV, Nature Documentary, TV Series (2022 now) (ENG, SUB ENG) , NationalGeographiczdenek1964, NatGeo, Naturezdenek1964, Documentary, AmericasNationalParkszdenek1964