All over the world, people say they are healed by things that turn out to be placebo. So it's easy to think that they must have been faking in the first place if all it took was a little sugar pill to assuage their ailments. But keep your scoffing at bay. That little white pill may be inducing some very real effects. We talk to placebo experts Fabrizio Benedetti and Tor Wager who tell us about the well-stocked pharmacy in our brains, just waiting to be unlocked.

Then pain expert, Dr. Daniel Carr, takes us to the WWII Battle of Anzio, where a puzzled young medic sees that the same bullet can create very different experiences of pain. And Daniel Moerman tells us how the color of a pill effects how well Italians sleep.