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David has been doing a bit of time travelling with the help of magician Derren Brown. He was fooled into thinking he could see into the past and future for a stunt on the new series of Trick Or Treat. Derren swooped after hiding in David’s make-up truck, on the set of Doctor Who, he said: "David's the only person who has ever screamed when I surprised them. But he reacted well to the trick, which used visualisation and suggestion techniques. He seemed to enjoy it."

Trick or Treat invites members of the public make a blind choice of a Trick or Treat card. If they pick "Treat", Derren will use his skills to ensure something pleasant happens to them; if they pick "Trick", the result will be something quite dark. The program notes state "this time round the game is raised for all involved"

Derrens Official Website makes no mention of the airing date yet.