I'm Spanish and it's difficult to understand everything quickly, but i'm striving for understand the two stories, i'm really impressed by these incredibles games. I completed it 3 times each one and i understand that Jack didn't kill Kathryn, only left her behind and his "meds" turn him in schizophrenic and he thinks he killed the only thing that made him feel in "the meadow" without cheat by reach the green box, and he blames himself for choose the drugs instead of her... Repeat! I'm Spanish and is possible that i didn't understand everything very well... But definetively these game have marked me a before and after in how see these things! BRAVO!