With decades of magic and performing under their belts, comedy duo Penn & Teller know how just about every kind of magic trick is accomplished. In PENN & TELLER: FOOL US, the illusionists invite fellow magicians to perform their tricks before a live audience. After watching from a seat on the stage, Penn and Teller try to figure out how the trick was done. If they can, the magician leaves in mild shame. But if he fools Penn and Teller, hes invited to perform at a Las Vegas casino.