Episode 2

A family of beavers lives down on the Snake River in the south of Yellowstone. Kirk takes a look at their huge dam and takes a peek inside their lodge using an infrared camera. As Spring begins to take hold, the beavers are about to reap the benefits of all the fresh new vegetation - and get to work.

Grizzly expert Casey Anderson is keeping an eye on a mom and her two 4-month-old cubs. They’ve emerged from hibernation and are facing the outside world for the first time as a new family. But Spring can be a time when these young bears are at their most vulnerable.

Spring in Yellowstone brings new life and a break from the brutal temperatures of winter, but the dangers aren’t over. The wildlife families now face a torrent of water cascading down the mountains as the Great Thaw gets underway, and the beavers are in particular danger.