Well, we've reached the end of the season and the ratings from PS are in:

Evil of the Daleks: 8.1
Power of the Daleks: 7.9
The Macra Terror: 7.8
The Underwater Menace 7.6
The Faceless Ones: 7.5
The Moonbase: 7
The Tenth Planet: 6.6
The Highlanders: 6.2
The Smugglers 5.5