They look like dragons and inspire visions of fire-spitting monsters. But these creatures with their long claws, razor-sharp teeth, and muscular, whip-like tails are actually monitors, the largest lizards now walking the planet. With their acute intelligence, monitors—including the largest of all, the Komodo dragon—are a very different kind of reptile, blurring the line between reptiles and mammals. Thriving on Earth essentially unchanged since the time of the dinosaurs, they are a very successful species, versatile at adapting to all kinds of settings. This program looks at what makes these long-tongued reptiles so similar to mammals and what has allowed them to become such unique survivors.