Doctor Who: Flatline had an Appreciation Index score (AI) of 85.
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.
- Mummy on the Orient Express & Flatline – 85
- Into the Dalek & Time Heist – 84
- The Caretaker – 83
- Deep Breath, Robot of Sherwood, Listen & Kill the Moon – 82