Apparantly there was an interactive digital episode of Doctor Who following the Christmas Special.
We pressed our red button when told to by David Tennant but the best that was on offer was Coldplay live.
It appears that the episdoe was not available to those of us on NTL, Telewest or quite a lot of Freeview boxes. The only reliable way to get it seems to have been Sky Satelite which I for one refuse to subscribe to.
The BBC trailed this episode widely and should have made it clear that access to it was so restricted. They should now make amends by showing the episdoe online.