In an interview with Whats On TV, Matt Smith has given a little sneak peak at what to expect from this years two Comic Relief mini episodes.
So, what can you tell us about the story?
"It's great. The set-up is that the three of us are all in the TARDIS together, and the TARDIS materialises within itself and there are two Amy Ponds. It's a real jaunt and a bit of fun."
Is there a bad Amy and a good Amy?
"I couldn't possibly say, but she is quite pleased to meet herself, put it that way. Rory is bemused by the whole affair but, needless to say, two Amy Ponds in his life is no bad thing. Karen really enjoyed playing two versions of herself and it is a really funny performance from her."
Was filming more fun than normal because it was for Comic Relief?
"We are always laughing during filming anyway, but it was really nice to get to do a sitcom-like story in the TARDIS. Sometimes it is good to do something out of context and stand-alone and not have a full story narrative to follow."
The special episodes will be shown on the evening of March 18th as part of the Comic Relief festivities.