Next airing Sun Nov 29, 5 p.m. ET

Seeing is Believing

Scientists have found that optical illusions are one of the best ways to get inside your head to see how your brain works. Through a series of fun, interactive games and illusions we'll play a few tricks on your eyes to show you how your brain builds your reality. You'll learn an easy way to turn beautiful celebrities into ugly monsters using only your mind, and how you can shrink a 6'4 man to half his height. Get ready to see why you shouldn't always believe your eyes - on Brain Games.