A look at how America's national mammal, once numbering in the tens of millions, was driven to the brink of extinction.

By the late 1880s, the buffalo teeters on extinction; a diverse and unlikely collection of Americans start a movement that rescues the mammal from extinction.

By the late 1880s, fewer than 1,000 buffalo remained, nearly extinct. In Episode Three, a diverse group of Americans—ranchers, conservationists, and visionaries—begin raising small herds across the country. By the early 1900s, their efforts unite into a movement that saves America’s national mammal from vanishing forever.

By the late 1880s, fewer than 1,000 buffalo remained, facing extinction. In Episode Four, a diverse and unlikely group of Americans begins raising small herds across the country. By the early 1900s, their combined efforts form a movement that saves the national mammal from vanishing forever.