9. The series claimed its first RT front cover for episode one of the historical adventure Marco Polo in the issue dated 22-28 February 1964
10. 1966 episode The Smugglers is the only Doctor Who production to feature absolutely no incidental music
11. The Wheel in Space (a 1968 six-part Cyberman story) was the only story to be made in all four of the BBC’s London studio sites: Lime Grove, Riverside, TV Centre and Ealing Film Studios
12. The Daleks debuted in the second Doctor Who story and propelled the series into the ratings stratosphere, with the last four episodes hovering around the ten million mark
13. You know him as the Doctor but did you know he was also a doctor? In a sickbay in 1967 story The Moonbase, the Time Lord was asked, “Listen, are you really a medical doctor?” to which he replied, “Yes, I think I was once, Polly. I think I took a degree once in Glasgow. 1888 I think. Lister.”
14. The first colour episode of Doctor Who was part one of Spearhead from Space, starring third Doctor Jon Pertwee, which aired on 3 January 1970
15. These days, it’s viewers – and River Song – who guard against spoilers but when Radio Times previewed Spearhead from Space in its 1969 Christmas edition, producer Barry Letts complained that the article was too revealing - as well as introducing new Doctor Jon Pertwee, it gave away most of the plot of the first Auton invasion...
16. The letters page of a February/March 1974 edition of Radio Times featured some correspondence from a 15-year-old schoolboy in response to the magazine’s Dr Who special. “The Dalek construction plans will no doubt have inspired many a school to build their own Daleks,” suggested the young man. “Who knows, the country could be invaded by an army of school Daleks!” The youngster’s name? Peter Capaldi. Best known to many as spin doctor Malcolm Tucker from The Thick of It, Capaldi is also familiar to Who fans as Caecilius in 2008 episode The Fires of Pompeii