The hour - long special aired on Christmas Day 2008 .
The hour - long special attracted 10,600,000 viewers , making it the fifth most watched programme on Christmas Day and the fifth most watched for the entire week ending 28 December 2008 .
The hour - long special aired on Christmas Day 2008 , and attracted 10,600,000 viewers , making it the fifth most watched programme on Christmas Day and the fifth most watched for the entire week ending 28 December 2008 .