Well, this'll keep me happy until Easter - the two Red Nose Day clips the "Doctor Who" team put out for Comic Relief this year. If you're the sort of person that care about this stuff, you've probably seen them elsewhere already, but never mind that. Just enjoy.
Part 1 - Space:
Part 2 - Time:
(I love Steven Moffat eternally for his use of wibbly-wobbly timey-wimey. He pulls it off marvelously and I can't get enough of it!)
One more thing - if you get a chance, donate to Comic Relief. Personally, I think it's a wonderful concept - having funny and entertaining TV while raising money for charity. Much better than the mushy sob-parade telethons I've seen broadcast in the US. Of course, Red Nose Day does feature some appeals meant to tug at your heartstrings, but it isn't one long marathon of misery - besides, shouldn't you feel good about helping people out, even if it's in the smallest ways?