Doctor Who Last Christmas had an Audience Appreciation Index score of 82.
The Appreciation Index or AI is a measure of how much the audience enjoyed the programme. The score, out of a hundred, is compiled by a specially selected panel of around 5,000 people who go online and rate and comment on programmes.
The highest scoring programmes from Christmas Day were Call the Midwife and Downton Abbey.
The BBC Three repeat of Last Christmas had 0.42 million watching, a share of 1.9% of the total TV audience.