The illusionist performs his latest psychological trick live, and also revisits some of the most memorable moments of his 20 years of making programmes for Channel 4. He reveals how he has used hypnosis and the power of suggestion to baffle the British public, before opening up about his most controversial, headline-grabbing moments, including playing Russian roulette, 'sticking' viewers to their sofas, and the zombie-fuelled Apocalypse illusion