The Doctor - David Tennant
RATINGS:Overnight: 8.2 million
DID YOU KNOW?:
As well as Martha, Francine, Clive, Leo and Tish, another 10 Jones's help make the show, ranging from Art Director and Props Maker to Editor, Runner and a website assistant.
It took three puppeteers needed to make the Judoon Captain talk, plus Nicholas Briggs to do the actual voice. Nick has previously provided voices for the Daleks and the Cybermen.
The Royal Hope Hospital doesn't really exist; in reality, the site that it occupies in London is taken by St Thomas' Hospital. Scenes at the hospital were filmed at The School of Care Science, University of Glamorgan, Pontypridd.
Director Charles Palmer is the son of distinguished actor Geoffrey Palmer, who appeared in the stories Doctor Who and the Silurians and The Mutants.
Eight Judoon costumes were made for the episode. Only one had an animatronic head underneath its helmet.
Mr Stoker's namesake wrote the story of the most famous blood sucker of all - Dracula!
The Doctor first used the pseudonym John Smith in The Wheel in Space and has adopted it occasionally ever since. However, the name was first heard in the series in the first ever episode, An Unearthly Child - popular beat combo John Smith and the Common Men could be heard playing on the radio.
The first episode of every new series of Doctor Who since Remembrance of the Daleks in 1988 has featured a view of Earth from space.
The Judoon aren't the first race of Doctor Who monsters to be inspired by rhinos. The first were the evil Kraals, designed by John Friedlander for The Android Invasion back in 1975.
Anne Reid, who plays blood-sucking Plasmavore Florence Finnegan, appeared in the 1989 story The Curse of Fenric. Here she played the ill-fated Nurse Crane, who had the blood sucked out of her!
The Doctor's been to the moon before, and met the Cybermen! (See The Moonbase).
The Doctor's original sonic screwdriver was destroyed in 1666, during The Visitation. We didn't see him use a new one until The TV Movie.
Fact File compiled by Peter Ware.