Originally Posted by Zac Quinn:
“2.11m. Biggest timeshift since 'Listen'.
7-day consolidated average of 7.25m after nine episodes.”
2.16m - it's overnight was 4.55m.
All sub-5m overnights, in size order:
4.54m > 6.49m (+1.95m) + 43.0% - The Hungry Earth (5.08)
4.55m > 6.71m (+2.16m) + 47.5% - Flatline (8.09)
4.56m > 6.44m (+1.88m) + 41.2% - The Lodger (5.11)
4.61m > 6.47m (+1.86m) + 40.3% - The Crimson Horror (7.11)
4.70m > 6.64m (+1.94m) + 41.3% - Nightmare in Silver (7.12)
4.81m > 7.01m (+2.20m) + 45.7% - Listen
4.82m > 6.91m (+2.09m) + 43.4% - Kill the Moon (8.07)
4.89m > 6.52m (+1.63m) + 33.3% - Journey to the Centre of the TARDIS (7.10)
4.89m > 6.82m (+1.93m) + 39.5% - The Caretaker
4.92m > 6.99m (+2.07m) + 42.1% - Time Heist (8.05)
Second only to Listen in timeshift numbers, from a sub-5m overnight but, in terms of percentage increase, the biggest. All in all, that's an especially impressive catch-up for an episode that started with the second lowest overnight of all.
Flatline overtook 14 episodes that rated lower in final ratings.