This clip was shown earlier today on the UK TV program Children in Need.
The light silly mood of the beginning of the clip is quite a contrast to the ending of The Waters of Mars. It appears that the Doctor has done quite a bit of travelling and has gone into trouble in between specials, running away from his fate.
The most shocking revelation comes when the Doctor tells Ood Sigma that he got married to Good Queen Bess (Queen Elizabeth the First and this probably explains why she knew him at the end of Season 3 episode 2 The Shakespeare Code while he didn't), that he slept with her and the she was no longer the Virgin Queen! Haha!!
Ahhhh Russel T. Davies.
But Enjoy it for yourselves!