Doctor Who: 20 Things You Didn't Know About The Day Of The Doctor
3. One Of John Hurt's Funniest Lines Was Cut
John Hurt reportedly had a great time filming The Day of the Doctor, and was so comfortable in the role that he would occasionally ad-lib during a scene.
An example of this occurred when the three Doctors are locked up inside the Tower of London. Just as Hurt was thrown into the room with his co-conspirators, he yelled "You can't lock me up with those two. I'll have my head off now!"
However, this line was cut in post-production. Moffat said that they were "fools" to not include it, because Hurt's delivery was apparently hilarious.