Let me warn you all now before you embark on this seemingly impossible quest. Once you get all the stats from the stat tree, there is not enough to get 100 for all 3 skills in each of the 4 categories. I know. Tragic.
I'm a bit confused as to how this fits in with Fixation. So Kathryn dies after he opens up the gate to let her go home, then because of his medication, he forgets that it ever happened. Plus he went home. So maybe Kathryn called paramedics to take care of his when she got home before she dies? I don't know.