Air date: 2018-04-27

Runtime: 45 min

Titans clash along California's big coast where rugged highlands meet the deep ocean.

Air date: 2018-05-04

Runtime: 45 min

The Land of Giants, where the tallest trees in the world tower over the Californian coast.

Air date: 2018-05-11

Runtime: 45 min

The High Cascades conceal the most active volcanoes in the Lower 48 that could erupt any time.

Air date: 2018-05-18

Runtime: 45 min

The perilous peaks of western Montana hide an ancient secret, America's glacier lands.

Air date: 2018-05-25

Runtime: 45 min

The amazing life around the Rockies, from low valley meadows to the peaks of its mountains.