I can appreciate the Doctor saying to hell with the rules if he thinks that there's a greater good in there somewhere, I suppose my sticking-point is that DW has always put so much emphasis on immortality being seen as more of a curse than a blessing, so it just seems really bizarre to me that he thought that he thought that he was doing the right thing by Ashildr. In the past he's given more than one speech about how living for a really long time basically just means that you live long enough to see the people around you die, he even says that again to Clara in this episode when he's admitting making Ashildr immortal, so how exactly did he think that he was helping Ashildr is what I'm getting stuck on

And the episode focuses on how much the people in her village mean to Ashildr, and that she doesn't know if she would find any kind of acceptance elsewhere, so I'm really curious to see how next week is going to pick up that thread when she meets the Doctor again after he caused her to outlive everyone in her village. In her position I would be pretty pissed-off with him!