0:00:24 > 0:00:28A beautiful summer's day in Cardiff.
0:00:28 > 0:00:31The sun has got his hat on, the birds are singing
0:00:31 > 0:00:34and in the middle of a meadow... there's a Mini?!
0:00:36 > 0:00:40We're in a cornfield, trying to work out what corn is.
0:00:40 > 0:00:45Karen said, "Is it for the cattle?" I said, "Is it for burgers?"
0:00:45 > 0:00:48- Arthur said it's sweet corn. - It's corn.
0:00:48 > 0:00:51No, but what does corn make?
0:00:51 > 0:00:54What other properties does it then go on to...?
0:00:54 > 0:00:57They can't have all that for just sweet corn.
0:00:57 > 0:01:01All this corn, peace and tranquillity
0:01:01 > 0:01:05is about to be disrupted - Doctor Who-stylee.
0:01:05 > 0:01:08# It's going to get, going to get It's going to get louder
0:01:08 > 0:01:10# We're going to get We're going to get
0:01:10 > 0:01:12# We're going to get stronger
0:01:12 > 0:01:15# We're going to feel going to feel, going to feel better
0:01:15 > 0:01:19# You can't tame this energy inside. #
0:01:19 > 0:01:20Whoo-hoo!
0:01:23 > 0:01:25We wanted a big, exciting moment
0:01:25 > 0:01:28when all three characters come back together
0:01:28 > 0:01:30and I wanted to kick off the story of Mels
0:01:30 > 0:01:33without giving away who she really is.
0:01:33 > 0:01:38So, to make her grand entrance, Mels picks some sort of fancy car.
0:01:38 > 0:01:41What was it again, Prince?
0:01:41 > 0:01:43# Little red Corvette
0:01:45 > 0:01:48# Baby, you're much too fast Yes, you are
0:01:48 > 0:01:51# Little red Corvette. #
0:01:51 > 0:01:53Action!
0:02:05 > 0:02:08- You said he was funny. You never said he was hot.- Cut!
0:02:08 > 0:02:11Me and Matt are going on a road trip.
0:02:11 > 0:02:15- We're getting rid of Karen first.- Rehearsal, please.
0:02:15 > 0:02:16She brings down our level of cool.
0:02:16 > 0:02:21If I had an Aston Martin with an ejector seat, I'd eject you!
0:02:21 > 0:02:25Right! Let's roll! A wee rehearsal, ladies and gents.
0:02:25 > 0:02:26Yeah.
0:02:26 > 0:02:28Here we go. And action!
0:02:29 > 0:02:30That's me, out of time.
0:02:30 > 0:02:35- Mels!- For God's sake! - I need to get out of here, now.
0:02:35 > 0:02:40- Anywhere in particular?- Let's see. You've got a time machine, I've got a gun.
0:02:40 > 0:02:42What the hell, let's kill Hitler.
0:02:42 > 0:02:43Cut there, thank you.
0:02:43 > 0:02:48'As luck would have it, that's exactly where they went next.'
0:02:55 > 0:02:57With the TARDIS having made such an impression...
0:02:57 > 0:03:00Look at this, Confidential. Hey, guys.
0:03:00 > 0:03:02That looks great. What a set.
0:03:02 > 0:03:05..the crew quickly find the clues to which party they've crashed.
0:03:07 > 0:03:09We are meant to come out of the TARDIS
0:03:09 > 0:03:12and not realise we're in Nazi Germany.
0:03:12 > 0:03:14I don't know if you've noticed,
0:03:14 > 0:03:16but there's big signs with swastikas.
0:03:16 > 0:03:20Sorry, is this your office? Had a sort of collision with my vehicle,
0:03:20 > 0:03:23faults on both sides. Let's say no more about...
0:03:23 > 0:03:25..it.
0:03:25 > 0:03:29Maybe we're all just a bit hazy from the smoke from the TARDIS.
0:03:29 > 0:03:31Taking it a bit too far, Kaz.
0:03:34 > 0:03:37I'm about to punch Hitler in the face,
0:03:37 > 0:03:41which is not something that happens every day.
0:03:41 > 0:03:43And action!
0:03:58 > 0:04:02I didn't think I'd get to punch Hitler in the face when I got this job.
0:04:02 > 0:04:07When I read it in the script, I did go, "That's probably the coolest line I've ever been given."
0:04:07 > 0:04:09- He was going to kill me. - Shut up, Hitler!
0:04:12 > 0:04:16126, Take 2, "A" camera.
0:04:16 > 0:04:22I, Mels, die and regenerate into River Song, which is quite mad.
0:04:22 > 0:04:25When I was little, I was going to marry you.
0:04:25 > 0:04:30Good idea, let's get married. You stay alive and I'll marry you, deal?
0:04:30 > 0:04:34- Cross your heart and hope to die? - Yes, of course. Twice.
0:04:34 > 0:04:38She regenerates into River and we suddenly work out what's going on,
0:04:38 > 0:04:42it's a huge revelation for us and for everyone at home.
0:04:42 > 0:04:47- OK, explain what is happening, please.- Mels. Short for...
0:04:47 > 0:04:50- Melody. - Yeah. I named my daughter after her.
0:04:50 > 0:04:52You named your daughter...
0:04:52 > 0:04:55after your daughter.
0:04:55 > 0:04:59Mels, who has been Amy's childhood friend,
0:04:59 > 0:05:01is in fact Melody Pond,
0:05:01 > 0:05:04and Melody Pond, then,
0:05:04 > 0:05:06regenerates into River Song.
0:05:06 > 0:05:08You're Melody?
0:05:08 > 0:05:10But if she's Melody, she's also...
0:05:10 > 0:05:13Oh, shut up, Dad. I'm focusing on a dress size.
0:05:13 > 0:05:17SHE SCREAMS
0:05:27 > 0:05:29SHE GASPS
0:05:32 > 0:05:36Right. Let's see, then.
0:05:36 > 0:05:390h, it's all going on down there, isn't it?
0:05:40 > 0:05:45'She's almost like a snake who's shed a skin, or, I guess,'
0:05:45 > 0:05:47like one of the Time Lords,
0:05:47 > 0:05:50who sheds a skin and becomes somebody else.
0:05:50 > 0:05:56She's suddenly learning to live in this new body, new look,
0:05:56 > 0:05:59new personality, even.
0:05:59 > 0:06:03Look at that! Everything changes!
0:06:03 > 0:06:05Oh, but I love it.
0:06:07 > 0:06:10I'm all sort of...mature.
0:06:12 > 0:06:14It's her, all right.
0:06:15 > 0:06:18Melody Pond.
0:06:18 > 0:06:20The woman who kills the Doctor.
0:06:20 > 0:06:24She's been programmed and brainwashed to be the woman who kills the Doctor.
0:06:24 > 0:06:28So the first thing she wants to do when she sees him is kill him.
0:06:28 > 0:06:30That's what she was brought up and reared to be.
0:06:30 > 0:06:34I was trained and conditioned for one purpose.
0:06:34 > 0:06:37- I was born to kill the Doctor. - Demon's Run. Remember?
0:06:37 > 0:06:40This is what they were building.
0:06:40 > 0:06:42My bespoke psychopath.
0:06:42 > 0:06:45- I'm all yours, sweetie.- Only River Song gets to call me that.
0:06:45 > 0:06:48- And who's River Song? - An old friend of mine.- Stupid name.
0:06:48 > 0:06:51In this episode, she kisses him
0:06:51 > 0:06:53because she's poisoning him.
0:06:53 > 0:06:55I'm all yours, sweetie.
0:06:56 > 0:06:59Kiss kiss.
0:06:59 > 0:07:01'This is the start of her story.'
0:07:01 > 0:07:05Where she gets the blue book from, we realise it's the Doctor.
0:07:05 > 0:07:07Why she becomes an archaeologist,
0:07:07 > 0:07:10cos it's the only decent way she can think of to find the Doctor.
0:07:10 > 0:07:14So it's the beginning, the start, it's the beginning of the River.
0:07:42 > 0:07:43We've got a lot to do this afternoon.
0:07:43 > 0:07:47We've got to get it finished because they need this location,
0:07:47 > 0:07:50and if we don't, we're in trouble because we can't come back here.
0:07:50 > 0:07:53It will cost lots of money. So wish us luck, Confidential.
0:07:53 > 0:07:55Marker.
0:07:55 > 0:07:58We're nearing the end of the sequence at the Temple of Peace.
0:07:58 > 0:08:00It's looking great. We got some really good stuff.
0:08:00 > 0:08:03We're just gearing up to shoot the sequence
0:08:03 > 0:08:05where River gives her regeneration energy
0:08:05 > 0:08:06to the Doctor to save his life.
0:08:06 > 0:08:08It's quite an emotional sequence,
0:08:08 > 0:08:11so the cast are getting really stuck into it. We had a great rehearsal.
0:08:11 > 0:08:14I need to talk to your daughter.
0:08:17 > 0:08:20'What she's giving up are all her future regenerations.
0:08:20 > 0:08:23'Because she knows, in the end,'
0:08:23 > 0:08:27if you are told that yourself,
0:08:27 > 0:08:30"That man you just killed will become the love of your life,"
0:08:30 > 0:08:33you think, "Can I spend the rest of my life knowing this man,
0:08:33 > 0:08:37"who I'll fall in love every time I see him, is the man I have killed?"
0:08:37 > 0:08:40Find River Song...
0:08:40 > 0:08:43and tell her something from me.
0:08:43 > 0:08:45Tell her what?
0:08:48 > 0:08:54This man is dying in front of her and she knows somehow
0:08:54 > 0:08:58that he is more important to her than she really understands.
0:09:04 > 0:09:10She then is shown a Teselecta of herself.
0:09:10 > 0:09:13Show me River Song.
0:09:17 > 0:09:23And she realises, from seeing this image of herself,
0:09:23 > 0:09:28who she really is and what the Doctor really means to her.
0:09:37 > 0:09:40River takes matters into her own hands and says, "I'll bring him back."
0:09:40 > 0:09:42It is predestined.
0:09:42 > 0:09:44She thinks, "That's my man and I believe it.
0:09:44 > 0:09:45"I believe it's true."
0:09:45 > 0:09:47What are you doing?
0:09:49 > 0:09:53Just tell me. The Doctor,
0:09:53 > 0:09:55is he worth it?
0:09:56 > 0:09:59Yes. Yes.
0:09:59 > 0:10:02He is.
0:10:02 > 0:10:06And she then makes somewhat of a sacrifice
0:10:06 > 0:10:08in order to keep him alive.
0:10:09 > 0:10:13MUSIC: "End Credits" by Chase & Status
0:10:34 > 0:10:39For a moment, the Doctor is there with a lady Time Lord who loves him.
0:10:39 > 0:10:43For a brief moment, then it all goes wrong, but that's relationships for you.
0:11:03 > 0:11:06Subtitles by Red Bee Media Ltd
0:11:06 > 0:11:09E-mail subtitling@bbc.co.uk