The Wedding of Sarah Jane Smith received an AI score of 87 for Part One and 89 for Part Two. Both episodes got the highest AI scores on any of the main four channels for the two days.
The two scores are the highest received for the series which also received the highest viewing figures on BBC one at this timeslot for this year.
The Appreciation Index, or AI, is a measure of how much the audience liked the programme. It is a score out of 100, based on responses from a carefully selected panel including a large childrens section. The average score for children's television is 72. A score in excess of 85 is regarded as excellent while a score below 60 is poor.