Saturday’s episode of Doctor Who, Heaven Sent, had an Appreciation Index score of 80.
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 AI scores for Series 9 so far are as follows:
The Magician’s Apprentice, Under the Lake, The Zygon Inversion & Face The Raven – 84
The Witch’s Familiar & Before the Flood – 83
The Girl Who Died & The Zygon Invasion – 82
The Woman Who Lived – 81
Sleep No More – 78