Prehistoric Assassins

Genre: History, Science

Premise: The two-part ``Prehistoric Assassins'' studies ancient creatures and discovers their prehistoric weapons are still found in their animal descendants today. The first episode dives deep underwater and gets up close with an enormous beast with a bite force three times that of a great white shark, while the second episode roams the land to find ancestors of modern-day saber-toothed cats, alligators and raptors.