I was waiting for you to finish! Wikipedia had the whole plot, and I'd been waiting to see your reaction.

If I was put in a position of choosing between ruining humanity's hope for a cure for zombies, and letting people kill a particular kid who I know and I've been protecting, I'm pretty sure I'd go with "Cry in the corner until I didn't have to choose, then curl up in a ball of crushing guilt forever".

Also, you and Ellie are adorable!