Louis catches up with some of the people he met whilst making a film 15 years ago.
Louis investigates the growing practice in the US of giving anti-depressants to children.
Louis puts his money where his mouth is and goes gambling in Las Vegas...
Just like dermabrasion, Louis peels back the layers in pursuit of physical perfection.
Louis Theroux meets a quirky American couple who have created Nevada's fanciest brothel.