The series opener features rare footage of newly awakened black bears hunting on the Yellowstone Plateau. Also: male bighorn sheep battle for breeding rights in the Rocky Mountains; puma cubs learn to hunt in the Chilean Andes.

A look at wildlife in the deserts of North and South America. Included: mustangs in the Great Basin; Humboldt penguins in the Atacama Desert; tiger moths in the Chihuahuan Desert; grasshopper mice in the Sonoran Desert.

In the northern wilderness, the moose reigns as king. Symbols of strength and endurance, these beasts are constantly fighting for survival against man, nature and the extreme temperatures of the chilling Alaskan winter. Follow along their tracks as the NGC offers an inside look at their battle against starvation and deadly encounters. Though many will fall and die along the way, witness the triumph of the victorious in Moose: Titans of the North.

Exploring the coasts of North, Central and South America. Included: male gentoo penguins perform mating rituals on the Falkland Islands; giant Humboldt squid cannibalize their kin in the Sea of Cortez off the coast of Mexico.

Wildlife in the forests of the Americas is examined. Included: river dolphins, jaguars and caiman crocodiles in the Amazon; Kermode bears in Canada's Great Bear Rainforest.