Doctor Who: The Return of Doctor Mysterio had an Audience Appreciation or AI 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 score is identical to that received by last year's Christmas Special The Husbands of River Song.
The highest score of the evening once more went to Call the Midwife on BBC One which scored 88.