Some of you may be familiar with the bi-annual telethon in Britain that is known as Red Nose Day, which is one of the main parts of the Comic Relief charity fund-raising measures. For the celebrations this year, they had a series of special episodes of various programmes, such as teenage comedy The Inbetweeners and a brief episode of Eastenders. However, my focus with this review is the two-part mini episode of Doctor Who that Steven Moffat has written for this year's Comic Relief. This one is a legitimate story, as opposed to his spoof that came out in 1999 called "The Curse Of Fatal Death".
The special was split into two parts, "Space" and "Time" (collectively known as "Time"). The plot opens with a rather lovely bit of banter about Amy Pond's skirt, leading to the TARDIS materialising inside itself (which reminded me a bit of Tom Baker's last serial, "Logopolis"), after which a slight time delay occurs between one TARDIS and the other - which is to say, you go in one door and appear out of the other a few seconds before or after you went in. Much flirting between past and future selves ensues as they try to get the TARDIS free and maintain the timeline.
Indeed, what got me interested in the episode initially (the same as, I believe, many other males) was a publicity shot of two Amy Ponds. Strictly for the understanding of how it would affect canon, you see. Well, I could claim that if it wasn't for the fact that this is brought up a few times.
The episodes are pretty short and pretty damn funny (they seem pretty adult-focused as well, as children might not get half the jokes in here), and as far as I can tell they are accepted to be canon, like the "Time Crash" episode for Children In Need in 2007. It could have been put into one episode as it is only 7-8 minutes long in total, including credits. Failing that, they could've been put into one video when it was uploaded to YouTube by the BBC here and here.
All in all, as it doesn't take that long of your time I certainly recommend checking them out and donate to the cause if you can.