Derren Brown: Trick or Treat - Madman

Seizoen: 1 - Aflevering: 4 / 4 - Eerst uitgezonden: 04 mei 2007 - Episode ID: 69953

In the main plot, Derren's "trick"-victim is Steven, whom he gives a taste of temporary lunacy. Side plots include Derren showing to Martin Freeman the power of new age crystals and a group of bankers guessing the number of pieces of candy in a jar and coming up with a numerical equivalent.