Summary:Derren Brown at his most devilish. He has persuaded members of the public to sign a Faustian pact with him and participate in a macabre game of Trick or Treat. Episode 4
Description:Steve is shown the darker side of London life by being given an opportunity to live life as a 'street' madman.
Martin Freeman is shown the power that new-age crystals can hold,while in America Derren predicts the behaviour of a large crowd of accountants.