"Seriously though, it's the best job in the world, I'm having a ball. It's a big responsibility, people are very enthusiastic about it, and that can be a bit of an undertaking."

And as for the rumoured Doctor nuptials, David says: "It's very difficult to answer – he doesn't not get married."

Graham also welcomes to the show comedienne Jo Brand, who joins David in reminiscing about their separate exploits for this year's Comic Relief.

David, who had a walk-on as part of the audience in The Proclaimers' video, reveals he didn't actually meet his favourite group on the day – "Matt Lucas knew I was a big Proclaimers fan ... I didn't really know what I was turning up for and it was an interesting collection of people ... but the band had been and gone by the time I arrived.

"I was devastated, so tonight I'm a bit over-excited..." – and proceeds to meet his musical heroes on the show when The Proclaimers perform their number one hit I'm Gonna Be 500 Miles.

RTD: Hello, I’m Nadine Baggott! (to DT, explaining who she is) She minces on about moisturiser.

RTD: We’re not going to answer any questions about Series 4… if you do [ask], I’ll come down there and slap you!

Question: Does the Doctor get married in Series 3?
DT (pondering the question): Yeeess…
RTD: All suspense, gone…
DT: He doesn’t not… That’s actually quite a difficult question to give you a truthful answer to.
RTD: Where’s Jessica Stevenson? (scans audience) She didn’t turn up!

Sam (Jo Whiley’s son): Did Yvonne Hartman [played by Tracy Ann Oberman] get sucked into the void?
DT: Let’s ask her!
TAO: I got turned into a Cyberperson. Although, frankly, Russell, listen…
RTD: For the rest of your life!
DT: Would you like to see her again? Well, she’s on the Weakest Link on Friday!
RTD: She’s too posh now, she’s got a column in the Guardian and everything! How to lose weight after having a baby. I follow it religiously.

RTD, to Daily Star reporter: The man who invented ‘Britney Spears is going to be in Doctor Who as a sex mad clone’. Were you bored that day, Peter? What was going on? You just made it up, didn’t you!
Star reporter: On a very serious note — David and Freema, when you had to kiss, did either of you slip the tongue in?

Jonathan Ross: You know, watching on the big screen with the sound, I thought, this has got to be a movie. It’d be great to have a Doctor Who film. Have you got any plans?
RTD: There are, er, we really haven’t got hours in the day to— I haven’t even got time for breakfast, let alone anything else. One day! One day, and it will be brilliant. But you know, we say that and then they come along and they say…
DT: “It’s got to have Britney Spears in it!”
RTD: And it would become a piece of trash…
DT: Not that we wouldn’t love to have Britney Spears in Doctor Who. I just want to slip that in.
RTD: As a good, bald alien… (to Ross) Give us the money, then. You’ve got it!
JR: I’m funding the Primeval movie.
RTD: ITV’s answer to Doctor Who!… We’re the BBC’s answer to Primeval!

South Wales Echo: What’s the best thing about filming in South Wales?
(pause)
(laughter)

Young boy: When are you going to go to the 1980s?
RTD: I never left!

Boy: Are you ever going to go back in time and meet Jesus?
RTD: Every year I hand that script in, every year… and he’s gay!

They also have a fantastic podcast from the night here.

Meanwhile The Daily Star say that the episode one monsters, the Judoon and the evil  Plasmavore, were too scary for kids at the launch of the show with children including Radio 1 DJ Jo Whiley's kids fleeing in terror. Jo admitted "We lasted ten minutes, the kids were terrified." Also at the bash were Catherine Tate and Tracy-Ann Oberman.

David spoke to DigitalSpy at the launch and told them that he would be up for the idea of past Doctor's appearing with him in a future episode:

 "Sure... it's a lovely idea, but I just don't know about the practicalities of it, really. It's one of those shows and because it goes on for a long time it has this history. It gets tougher though... as the years move on," Tennant continued. "Let's be honest, we've lost three, unfortunately," he added, referring to the fact that William Hartnell, Patrick Troughton and Jon Pertwee - the first three actors to play the role - have all passed away.

David reminisced about the impact such a reunion show had on him as a young fan, specifically the 1983 90-minute special: "I remember as a kid 'The Five Doctors' being the most important thing that had ever happened, so it's a nice idea. I just don't know if practically we could make it happen again."

• Visit our Doctor Who Series Three Section.

• View the clips now.

• Make sure you get your copy!

• Click here to purchase the DVD.

• Click here to download the track.

• Click here to buy a Red Nose.

• And if you would rather just donate some money straight to the charity then visit www.rednoseday.com

This year will see the biggest roll call of top presenters ever! Jonathan Ross, Russell Brand, Lenny Henry, Davina McCall, Graham Norton, Chris Evans, Paul O'Grady, Fearne Cotton and Kate Thornton will be beaming live into your living room on a night guaranteed to keep you glued to your couch.

You can see Kate Moss make an appearance as Vicky Pollard's sister in Comic Relief Does Little Britain Live and Dennis Waterman finally meets his mini version and gets to sing the theme tune!

You'll be wiping away the tears of laughter and sadness when Dawn French dons the collar one final time, and it really is the last one, in a special Vicar Of Dibley written by Richard Curtis and featuring an A-list visitor to the village – the one and only Sting.

Richard Curtis also got behind the camera to film a brand new Mr Bean sketch especially for the Big One. This time the loveable yet clumsy Bean finds himself at the wedding of an unsuspecting couple played by Michelle Ryan and Matthew MacFadyen. Expect mishaps and mayhem as well as a very angry father of the bride played by David Haig.

Catherine Tate has teamed up with Lenny Henry and Doctor Who star David Tennant as well as some other surprise guests for some un-missable new sketches.

Of course it wouldn't be Red Nose Day without some of your favourite TV shows getting the Comic Relief treatment.

Tune in to see the conclusion of Comic Relief Does The Apprentice – two teams will be battling it out in a Sir Alan Sugar style girls v boys showdown.

Doing their very best not to be fired or even get torn off a strip in the boardroom will be Cheryl Cole, Rupert Everett, Maureen Lipman, Jo Brand, Ross Kemp, Trinny Woodall, Alastair Campbell, Karren Brady, Piers Morgan and Danny Baker.

The two hottest girl bands on the planet have teamed up for this year's official Red Nose Day single. Sugababes and Girls Aloud will be releasing their version of the Run DMC/ Aerosmith classic Walk This Way. Expect an electrifying performance from the girls on the night!

Comic Relief Does Fame Academy is back by popular demand and only two celebrities will be left standing and rasping to battle it out and follow in Edith Bowman's footsteps to win the viewers' votes, raise some cash and be crowned champion.

Presenters Patrick Kielty and Claudia Winkleman will be on hand to protect them from the judges' comments. Sparks and microphones will fly...

Harry Hill will provide us with a special Comic Relief themed TV Burp, Armando Ianucci presents his worst moments from Comic Relief while Simon Pegg and Nick Frost present their favourite Red Nose Day clips.

The Mighty Boosh bring their own brand of anarchic humour live to the Comic Relief studio, and Mitchell and Webb will also treat us to two live versions of popular sketches from their hit BBC Two show.

Tune in for a very special surprise from Peter Kay, plus see Ricky Gervais as you've never seen him before.

There will be some new Creature Comforts from Aardman Animations who have also teamed up with cutting-edge comic Marc Wooton to create an exclusive new character.

Tim Westwood and the crew of MTV's hit show Pimp My Ride UK, made a special pit stop to surprise the elderly ladies of Leek, Staffordshire, with news that their shabby, rust-encrusted mini-bus was to be pimped. Tune into the show to see the result of all their hard work.

The Big One will also feature the biggest names in music.

Two of the greatest bands in the world today - Take That and The Killers - will perform live.

There will also be special reports from Billy Connolly and Ant & Dec.

During the night viewers will also see how their money has helped Comic Relief make a real difference to vulnerable people in the UK and Africa.

Despite being one of the famous faces on TV, David's always really friendly and he bounded over to say hello. And we had a quick chat about the new series.

He also gave away a few snippets about what he was doing here. He was filming for the fab behind the scenes show Dr Who Confidential which comes on BBC3 straight after each episode. In fact, he was doing the whole episode himself - and it was all about the 10th story in the new series which is called Blink.

The team filming with David, from the camera crew to the boss, Gillane, were all really great as well - I love chatting to fellow Dr Who fans. I tried to overhear a bit of what David was talking about during the filming, but could only catch a few snippets. Which I'd better not repeat here.

David's been filming since last summer, and revealed that filming will finally finish at the end of this week. But he did promise me that series 3 will be 'bigger and better than ever'.

• Read the rest of Lizo's blog here.

Signed Script Up For Auction

David's personal script from the Doctor Who series 2 episode, The Satan Pit, is going to auction on Wednesday 28th March. It has been signed by David, Billie Piper and Russell T Davies and all proceeds will go to charity (the PTA of David's Godson's primary school). The auction wll take place at the John Nicholson Auction Rooms in Surrey.

There is a reserve price of £1,000 on this item. The lot number is 421 and it is expected to appear at approx 12:00pm to 12:30pm

Members of the public are invited to attend.

Details of the Auctioneer are as follows:

“She’s very independent,” Freema continues. “Martha lives on her own and you get the sense that the Doctor interrupts her life! She’s spent a very long time training to be a doctor herself – and is close to qualifying.”

We find out what it’s like to be the new girl aboard the TARDIS, and ask Freema if she thinks Martha and Rose would get on if they met.

Also this issue:

* Cool competition! – Want to win a life-size Dalek Sec? Don’t miss part one of a special competition to win a brilliant black Dalek!

* Preview – There’s a full preview of the first episode Smith and Jones with exciting photographs from the new adventure.

* Monster facts – Oodles about the frondly aliens called the Ood.

* Comic strip – Will the Doctor escape the hungry plants?

* Make it! – Find out how to build a Dalek dome so you can exterminate your friends.

* Quiz – Discover if you’ve got what it takes to travel in the TARDIS by taking our companion quiz.

* PLUS posters, puzzles and adventure on every page!

This issue comes with a free Dalek or Cyberman camera – choose your favourite monster or collect both! There’s also a bonus wall chart to prepare you for the return of Doctor Who.