There is an explicit contrast between this and #TerroroftheAutons Jo has come a long way from the girl who fell straight under the Masters power and brought a bomb into UNIT, to the woman who can now completely resist him #DoctorWho #FrontierinSpace

At the end of #TerroroftheAutons the Doctor took the Masters dematerialization circuit meaning he couldn't have left Earth to find this alien. This therefore suggests that he set up this plan as a backup in case his Auton plan failed #DoctorWho #MindofEvil

Maybe I should start tracking his disguises, but compared to the mask in #TerroroftheAutons this one leaves a lot to be desired. Not quite the master of disguise in this one, must be one of his worst attempts surely? #DoctorWho #MindofEvil

"You don't seem very worried about it" "I'm not. As a matter of fact, Jo, I'm rather looking forward to it" I agree that this is an odd reaction from the Doctor when so many people have died but I have to say I am rather looking forward to it myself #DoctorWho #TerroroftheAutons

I had never realised before that the Brigadier was not played in Nicholas Courtney in the outdoor scenes of this episode. I saw this comment just as I was starting to watch the episode and you can see it when you know #DoctorWho #TerroroftheAutons

My favourite part of the conclusion is the idea that the Master has an endless supply of rubber masks of his own face on hand for just such eventualities #DoctorWho #TerroroftheAutons

The idea that the Master didn't think about the massive and obvious flaw in his plan until the Doctor points it out leading to an immediate change of heart would ruin any other villains credibility. It works here solely on Roger Delgado's performance #DoctorWho #TerroroftheAutons

"Yes, of course. Dissolved by carbon dioxide from the lungs" wait a minute, surely it should dissolve then as soon as it is applied and be useless (it dissolves as soon as the Doctor breathes on it)? #DoctorWho #TerroroftheAutons

Can anyone explain to me what is going on here. The Brigadier suggests blowing up the coach with a missile and the Doctor reacts as if it is a terrible idea. Why? Surely it is quite a good plan? Is he just worried in case the Master gets hurt? #DoctorWho #TerroroftheAutons