Steven Moffat has told how John Hurt could steal the scene from his Day Of The Doctor co-stars David Tennant and Matt Smith with just a look.
All three actors are playing different incarnations of the Doctor - John Hurt's is an unknown, dark version - and while the Ten and Eleventh Doctors were their usual energetic selves, Hurt was rather less so.
"It was great fun," said Moffat. "You'd have David and Matt, they’d be leaping around the set and doing every form of physical comedy with each other – and, you know, slightly competing about who could be slightly more insane than the other – and then John Hurt would come along and do this [tiny movement] with his eyes and you go 'That's it – he's got the scene now hasn't he?'"
He added, "John was delightful – delightfully grumpy in every single way. During our last meal [while filming] he got grumpy about the fact that he liked the wine! He's not actually grumpy, he's actually a really, really lovely man."
The Day Of The Doctor stars Matt Smith, David Tennant, John Hurt, Jenna Coleman and Billie Piper and will be simulcast around the world at the same time as it is aired on BBC One on Saturday 23rd November.
Source: Radio Times