"Sleep No More" - AI score

"Sleep No More" had an Audience Appreciation Index (AI) score of 78.  The AI scores so far this series are:

"The Magician's Apprentice" - 84
"The Witch's Familiar" - 83
"Under the Lake" - 84
"Before the Flood" - 83
"The Girl Who Died" - 82
"The Woman Who Lived" - 81
"The Zygon Invasion" - 82
"The Zygon Inversion" - 84
"Sleep No More" - 78

This is only the second time the AI score (which was introduced in 2005) has been under 80 - "Love and Monsters" scored 76 in 2006.

The Audience Appreciation Index (AI) is a score out of 100 which is used as an indicator of the public’s appreciation for a show. Over 90 is considered exceptional, 85 or over is excellent, 60 or less is poor, and less than 55 is very poor.

Source: doctorwhonews.net