On Sunday, Discovery wraps its North America series with two final installments: North America: Revealed, the making-of hour, at 9 p.m. ET, followed by North America: Top 10, a countdown of viewers’ top destinations on the continent as voted on Facebook. As fans of these kind of Discovery series know, the behind-the-scenes installment is always the most fascinating because you’re watching both the animal behavior or natural phenomenon and what the crews went through to capture it. In the case of North America, that involved visiting eight countries and nearly 30 U.S. states for more than 2,800 days in the field, going head-to-head with Hurricane Irene, and, as you’ll see in our exclusive clip below, using an ATV to film — and flee — brawling bison.

Read more: