Jem Stansfield builds a vortex cannon to pick up where the big bad wolf failed to blow over a house of brick; Dallas Campbell takes on the big brother technology that will track every one of us simply by the way we walk; Liz Bonnin confronts the controversial US scientist working to create the first generation of artificial life; and Dr Yan Wong tackles unsuspecting shoppers with a simple question: how do you cook an egg with a piece of newspaper?

The show’s own verdict is on its page.