The fourth and final episode of the first series of BBC Radio 4's The Infinite Monkey Cage, in which physicist Brian Cox and comedian Robin Ince take a witty, irreverent and unashamedly rational look at the world according to science. Originally broadcast on 21 December 2009.

Robin and Brian are joined by Victor Stock, Dean of Guildford Cathedral, and science journalist Adam Rutherford for a special Christmas edition of the programme, Science and Religion. Adam explains why religion really could be good for your health. Can Victor convert Robin and Brian in time for the festive season?