Season 11 episodes ranked by Imdb voters
Average is about 6.5
7.4 Rosa
7.3 The Woman Who Fell to Earth
6.9 Demons of the Punjab
6.8 It Takes You Away (DD)
6.7 Kerblam! (D)
6.4 The Ghost Monument (D)
6.2 Witchfinders (UU)
6.1 The Battle of Ranskoor Av Kolos (DDDDD)
5.5 Arachnids in the UK (D)
5.4 The Tsuranga Conundrum
Update: several ratings have changed over 2 days. Each D or U indicates down/up 0.1. Dec 17: Battle plummeted.