3. Earth gives in, gives the 456 10% of our kids and the 456 leave...with a parting message. 'We will return!'
Personally option 1 would have been unsatisfying, 2 a bit too grim, whilst 3 leaves all sorts of future possibilities, what would the earth left behind be like? Maybe it's the writer in me but I can evisage all sorts of possibilities. Hell you could set an entire series on a post 456 earth.
I do think that sort of story has enormous possibilities. I'm not sure that's what I would have wanted to see in this context. However, I can easily imagine a great dystopian future novel where we see the aftermath of a world where the government made a controversial decision to kill many innocents to save the rest of the planet.
It would have gotten rid of a treasonous government that deserved to be overthrown for betraying its own people.
I can't argue with that. I kept praying the whole time for someone to put a bullet in that PM's brain. In fact, for most of episodes 4 & 5, I thought that was exactly what would happen at the end. I thought that we were going to find out at the end that that hard-ass assassin chick secretly had a child that she gave up for adoption years ago. So once the dust settled at the end, she would mete out the lethal vigilante justice that he so richly deserved.
Hey, here's an irony for you: For some reason, even though I'm the one that started this thread, I'm not able to access the 1st page of it. Every time I click on the link, I get redirected to a Googlesearch page that tells me that the URL doesn't exist.

Yet page 2 works just fine.

So I'm flying a bit blind here. However, it seems that I'm the only one who wants to say to Jack, "Don't you come back no more." I understand that he made the only good choice left available to him when he sacrificed his grandson at the end of "Children of Earth" to save the rest of the planet from the 456. However, regardless of how justified his actions were, it still hurts too much to watch because it wasn't really his sacrifice to make. I think it's taken the character into too dark of a direction for him to recover.
Part of the problem is that I don't think Jack ever really worked as a dramatic character prior to this. He was always at his best when he was the fun, dashing rogue on
Doctor Who or occasionally on some of the more lighthearted moments of
Torchwood. But that tone is so totally incompatible with the tone of "Children of Earth," I just can't see where the character can go from here. (Well, I can see a few options but none are ones that I'm interested in exploring.)
Oddly enough, I think it wouldn't have bothered me so much if it has been another character who had done the same thing. Owen was such a dour, self-loathing wretch to begin with, this would have been just another notch on his angst-meter. The Doctor has had a pretty strong dark side ever since the show 1st relaunched in 2005. I'm convinced he's done far worse back during the Time War.