An Iditarod racing team, a rescue dog and his trainer, and a survivalist with her Lab face the wild.

A rescue expert, a survival instructor, and a wilderness enthusiast face the wild with their dogs.

Three teams rely on each other to survive.

A vet, an engineer, and a trainer rely on their dogs.

Human-dog teams put their skills to the test

A veteran, outdoorsman, and climber battle winter.