The Christmas Day broadcast of Doctor Who: Voyage of the Damned was the most view Doctor Who episode in 28 years, averaging 12.2 million viewers and a peak of 13.8 million. This is the highest viewership of a Doctor Who episode since City of Death in 1979 when it was only The BBC and ITV and ITV was on strike. More details on The Doctor Who News Page and at BBC News. The only thing higher in the UK was Eastenders at a peak of 13.9 million. When it likely airs on SciFi later this year, it will do well to get 2 million viewers. At the end, the BBC aired a trailer for Doctor Who Series 4 and also a short one for Torchwood.
You can see those currently on YouTube below with both the Doctor Who series 4 trailer and the Torchwood series 2 trailer as they aired on the BBC:
The BBC has still not yet confirmed WHEN they will start airing Torchwood, although it is likely starting Wednesday, January 16th on BBC2. BBC America has said it will start airing Torchwood series 2 on Saturday, January 26th and has started airing the following preview...
Note: All photos are copyright The BBC/BBC America