0:00:02 > 0:00:05Older, and older, and older.
0:00:15 > 0:00:18I saw a picture of what he's gonna look like so I had that in my head.
0:00:18 > 0:00:23I haven't seen what they're gonna make that little homunculus Doctor look like.
0:00:23 > 0:00:25I don't know.
0:00:25 > 0:00:28We take the Doctor to that much of a low so when he returns,
0:00:28 > 0:00:33it's light shining and supernatural power blazing out of him, so his return is all the more glorious.
0:00:59 > 0:01:04I just felt a bit of a goon, to be honest. Flailing around for...
0:01:04 > 0:01:07I think it had to be three minutes because they removed so many frames
0:01:07 > 0:01:12to get the amount of time so that they could get this effect.
0:01:12 > 0:01:16There was a lot of flinging my arms around for a long time.
0:01:22 > 0:01:25OK, cut, thank you.
0:01:28 > 0:01:30I'm very happy with what we've got.
0:01:30 > 0:01:35With the sound, and we put on all the screaming and so forth
0:01:35 > 0:01:38and the effect of the ageing, it works out beautifully.
0:01:38 > 0:01:44Older, and older, and older...
0:01:57 > 0:02:00Received and understood, Miss Jones.
0:02:03 > 0:02:05Let's have that back again.
0:02:05 > 0:02:09In the script, it said the Doctor is aged by 900 years,
0:02:09 > 0:02:12and then we have a shot of a suit on the ground.
0:02:12 > 0:02:18It says that the 900-year-old Doctor pops up his head through the suit,
0:02:18 > 0:02:23and it is a little wizened creature on a thin little neck.
0:02:26 > 0:02:33To do that, I had just a green ball the size of his head on a stick, which poked up through the clothes.
0:02:33 > 0:02:35That will be replaced by the CG doctor.
0:02:49 > 0:02:54Lip synching is very difficult to do and we almost always avoid it
0:02:54 > 0:02:57because it's time consuming, difficult and expensive.
0:02:57 > 0:02:59However, the mill were determined to have a go.
0:02:59 > 0:03:02Why come all this way just to destroy?
0:03:02 > 0:03:09We covered David in beads around all the muscle areas of his face,
0:03:09 > 0:03:12which we then used for tracking information.
0:03:12 > 0:03:16They filmed me speaking the lines but absolutely straight down
0:03:16 > 0:03:19the lens, and then they will use that to animate the speech.
0:03:19 > 0:03:22But you're changing history.
0:03:24 > 0:03:27Not just Earth, the entire universe.
0:03:27 > 0:03:29I'm a Time Lord.
0:03:29 > 0:03:31I have that right.
0:03:31 > 0:03:33But even then,
0:03:33 > 0:03:37why come all this way just to destroy?
0:03:37 > 0:03:41We come backwards in time, all to build a brand new empire...
0:03:41 > 0:03:44'I was just talking to nothing in a cage!'
0:03:44 > 0:03:47I was talking to an eye-line.
0:03:47 > 0:03:48Can't you hear it?
0:03:50 > 0:03:52Listen, it's there now, right now!
0:03:53 > 0:03:57He doesn't want the Doctor dead. A dead Doctor is quite useless.
0:03:57 > 0:04:04He wants the Doctor to suffer, until he ends up like a parrot in a cage.
0:04:04 > 0:04:08It's the absolute humiliation before the huge return.
0:04:08 > 0:04:10We take the Doctor to that much of a low,
0:04:10 > 0:04:14so that when he returns, it's light shining and supernatural power,
0:04:14 > 0:04:17blazing out of him, so it's all the more glorious.
0:04:17 > 0:04:21I told them that if everyone thinks of one word at one specific time...
0:04:21 > 0:04:23Nothing will happen. Is that your weapon?
0:04:23 > 0:04:25Prayer!
0:04:25 > 0:04:29- Doctor.- Doctor. - Doctor.- Doctor.- Doctor.
0:04:33 > 0:04:37He goes from little wee 900-year-old Doctor to the old Doctor we've seen.
0:04:37 > 0:04:41Stop it. No, no, no, no, no, you don't.
0:04:41 > 0:04:44The one thing you can't do
0:04:44 > 0:04:46is stop them thinking.
0:04:46 > 0:04:50Tell me the human race is degenerate now!
0:04:50 > 0:04:55I knew in the script the Doctor levitated, but nobody had told me we were going to do it for real.
0:04:55 > 0:04:58I assumed it was computer generated until that morning
0:04:58 > 0:05:01and there's this wire harness and someone comes in
0:05:01 > 0:05:07with one of those blooming things that they strap you into that make your back hurt for the next week.
0:05:32 > 0:05:35So, yeah, a bit of wire work, hanging in the air, being pulled across.
0:05:35 > 0:05:39It was not the most comfortable morning I've ever had!
0:05:39 > 0:05:40No!
0:05:40 > 0:05:42Nooo!
0:05:46 > 0:05:47I order you to stop!
0:05:47 > 0:05:51- ALL:- Doctor! Doctor! Doctor!
0:05:51 > 0:05:54The one thing you can't do
0:05:54 > 0:05:56is stop them thinking.
0:05:58 > 0:06:01It's a big deal, that moment, for the Doctor.
0:06:01 > 0:06:06He had to spend a year tuning himself into this psychic network,
0:06:06 > 0:06:09putting this plan together, relying on Martha to go round the world
0:06:09 > 0:06:13and save it from itself and from the Master.
0:06:14 > 0:06:16Open up this way a bit.
0:06:16 > 0:06:19That's the opposite to how we did it in the other one.
0:06:19 > 0:06:23It's been a huge undertaking and he does it, and he does beat him
0:06:23 > 0:06:25and he does literally save the world.
0:06:44 > 0:06:46Subtitles by Red Bee Media Ltd
0:06:46 > 0:06:48E-mail subtitling@bbc.co.uk