CAST:

RATINGS:

DID YOU KNOW?:

42 minutes is the approximate length of a standard episode of Doctor Who (minus titles and credits).

42 is the age that Russell T Davies reached when Series 1 of Doctor Who began in 2005.

The first Doctor Who story that Director Graham Harper worked on was nearly 42 years ago, when he was a floor assistant on The Power of the Daleks.

42 was the age at which Elvis Presley died.

42 minutes was the length of The Beatles' last live gig, performed on the roof of Apple HQ.

To date, Elvis has had 21 number ones in the UK music charts; The Beatles have had 17.

"Allons-y!", a phrase much favoured by the Doctor of late, is French for "Let's go!"

Normal human blood temperature is 37 degrees centigrade.

42 is not a Happy Prime number.

CLASSIC CONNECTIONS:

"Burn with me" were the last words of Plasmavore Florence Finnegan, who featured earlier this series in Smith and Jones.

Similar themes to those in 42 were explored in the classic series adventure Planet of Evil.

Pentallian drives were an essential component of the transmat devices in Revenge of the Cybermen.

42, according to The Hitch Hiker's Guide to the Galaxy, is the answer to Life, the Universe and Everything. Douglas Adams, the author, was both a writer and script editor on the classic series of Doctor Who.

The actress Adjoa Andoh, who plays Francine Jones, first appeared in Doctor Who under heavy make-up as the chief Cat Nun, Sister Jatt in New Earth.

Fact File compiled by Peter Ware.