This episode begins by looking at belief in God and what Glenn Chestnut calls "the mysterious X factor. It goes on to explore the four classical evidences for the reality of God: (1) the cosmological or first cause argument, (2) the teleological or argument from order, purpose and design, (3) the ontological argument or the evidence from the being of God, (4) and the moral argument of Kant and C.S. Lewis. Where did the universal human sense of right and wrong come from? What is its source?.Reason and science are seen as complimentary. Both, at their best, share a passion for knowledge and an enormous sense of awe and wonder. Ultimately each of these arguments is seen as best understood from the perspective of sacred mystery.