Nicola Kelly speaks to performers, dentists and therapists who use hypnotism in their work and discovers how the brain functions when in a trance. Through hypnosis, she faces her own fear of rats, hears from a patient who had his front tooth extracted without anesthetic and witnesses colleagues convinced they are Donald Trump.

But does the hypnotic trance really exist? Sceptics explain why they no longer believe it works and set out the hidden dangers.

Presenter: Nicola Kelly

Producer: Chloe Hadjimatheou

(Image and Credit: Ben Dali)