The AI score is a measure of how much the audience enjoyed the episode and is based on a survey of 5000 people. The score of 87 puts the programme into the excellent category.
The episode scored higher than most other programmes on Saturday nightbe it was beaten by the Last Night Of The Proms which scored 90 and Paralympics London 2012.
Dinosaurs On A Spaceship finished 18th for the week, being pushed down by Sunday's X Factor and the closing ceremony of the London Paralympic Games. Final figures should be released next week.