See the world through the eyes of nature’s fastest animal: the peregrine falcon. Though once perilously endangered in the US, this spectacular predator is now thriving again in American cities and on every continent but Antarctica. What is the secret to their predatory prowess? To find out, WGBH's Nova follows a young family of peregrines in urban Chicago as the chicks hatch and learn from their parents to fly and hunt. And join expert falconer Lloyd Buck as he trains a captive peregrine and puts its hunting skills to the test. What’s the secret behind the peregrine falcon’s blistering speed, able to reach nearly 200 mph?

Find out tonight at 9pm on WGBH 2.