CAST:The Doctor - David Tennant
RATINGS:Overnight: 6.6 million
DID YOU KNOW?:
World War I, triggered by the assassination of Arch Duke of Austria Franz Ferdinand, took place between 1914 and 1918. Over nine million people died in the conflict. Among them were boys who had lied about their age in order to enter into battle for King and Country.
In the Year of Our Lord 2007, there were fewer than five veterans from the First World War still alive and living in the UK.
The Doctor has long yearned for 'normal' human life like the one that John Smith could have had. He confessed as much to a young married couple in Father's Day.
Despite appearances, the Doctor is an immensely powerful being. Don't make him angry. You won't like him when he's angry.
Smith's Journal Of Impossible Things was created by artist Kellyanne Walker, based on text provided by Paul Cornell. Kellyanne's brief was to reflect the fact that Smith wasn't an excellent artist - and that these were images and thoughts from his dreams that he had rushed down on paper before he forgot them.
One thing that 'Baines' never did was Blink.
In the original book of Human Nature, there was a character called Moffat, named after Paul Cornell's friend and fellow writer, Steven Moffat.
Blink by Steven Moffat is the next episode of Doctor Who.
Among the many Gods and Demons that the Doctor has fought are Azaal (The Dæmons), Sutekh (Pyramids of Mars), the Gods of Ragnarok (The Greatest Show in the Galaxy) and The Beast (The Satan Pit).
Dwarf Star Alloy first appeared in the story Warriors' Gate. It is extremely dense and very, very heavy.
Fact File compiled by Peter Ware.