Doctor Who: 20 Things You Didn't Know About The Day Of The Doctor
18. The Episode Originally Began With A Voiceover
The Day of the Doctor begins with that iconic old-school Doctor Who title sequence, before transitioning into a scene of Clara teaching a class.
The quote she reads here ("Waste no more time arguing about what a good man should be - be one") was director Nick Hurran's idea, and according to Steven Moffat, it took him absolutely ages to find.
Originally though, Moffat's script included a voiceover spoken by the Doctor (or somebody else, he wasn't fully sure), but this was abandoned simply because he didn't like it:
"Long ago, on the lost world of Gallifrey - the planet of the Time Lords - there was a legend much loved by the children. It told of a great hero who would return on their darkest day to save them all. But first, he would have to save himself."
Feels a bit too "Hollywood" doesn't it? A bit too on-the-nose. Definitely the right decision to cut it!