The Best Episodes Directed By David Johnson

For the first time, and through the eyes of two special mountain lion families, the true nature of North America's big cat can finally be revealed. Set in Wyoming's spectacular Rocky Mountains, the dramatic story of two mothers struggling to raise their kittens is helping scientists rewrite our understanding of these elusive predators. This is mountain lions up-close, in-depth and more intimate than ever before.

A four-ton elephant seal returns to his breeding beach on the cusp of summer—and quickly learns the competition for females is fierce.