The most harmless character killing the mastermind – I don’t know, man. It seems about as likely as Walt Jr. killing Heisenberg. Can’t wait for tonight!!
A bit of a wild assumption, I know, but she’s basically the only character that sees Walt as pure evil. All the other characters have their own conflicting opinions, to a degree. In her eyes, he killed her husband. Not that it will be massively pre-medidated, but I feel that there may be an opportunity, and she will take it. Most likely when he’s making up with his family or something.