After the whimsical feel of the first episode of Series 5, the second episode The Beast Below took on a much darker tone. This episode immediately proved that Steven Moffat and Matt Smith were ...

hoping to win a large cash prize. But what they do not realise is that a mysterious beast lurks underground.

The Doctor, in his eleventh incarnation, is an excited explorer of the universe, with a keen intelligence that means he often notices what everyone else has missed.