Why Reality TV is a magnet for fame-chasers: Donie O'Sullivan goes headfirst into the cutthroat world of reality TV where stardom is won by just being yourself - sort of.

Simulation theory, the belief that the world around us is rendered like ‘The Matrix,’ is not just science fiction. Amateur investigators are now seeking proof. Donie O’Sullivan joins them in their search for ‘the code.’

Witchcraft, Wicca, and Paganism are more popular than ever, with some estimates topping 2 million practitioners in the US. Donie O'Sullivan meets with modern witches to discover what they've found in witchcraft that they haven't elsewhere.

With concerns over factory-farmed meat, so-called ethical carnivores are going beyond grocery stores, taking action to control what's on their plates. CNN's Donie O'Sullivan joins groups hunting squirrel and searching for roadkill to learn why.