"The last episode's name is: Mother's Mercy."

Good point. Can time travellers change the future, (like "Terminator" and "Back to the Future") or will the future stay the same no matter what they do (like "Twelve Monkeys" or the Tim Powers book "The Anubis Gates")? The book does address this and I imagine the TV series will too.

It's obvious that this is going to contain spoilers, right?

OK, I was on the Guardian discussion of this episode and someone there pointed out that the central theme of the episode wasn't discussions of masculinity, as the review here thinks, but the Oath. I went back and watched it again and it seems clear that this is the case. The very first scene starts with Sam and Jon…