If-Then-Else
Wow, that was incredible. I can't imagine coming up with anything better to demonstrate the machine's god-like abilities than how they did it in this episode. Calling it an outright 10/10 may seem a bit much but it's hard to find a single flaw. In approximately forty minutes they have a microcosm of the entire show. From Harold teaching his machine both strategy and morality through their game of chess and all the little character moments. John being a hero, Fusco proving he's smart and compassionate, in spite of how he hides it behind his humor, and of course Root and Shaw.
Root seems somewhat controversial. For me it's the best character Amy Acker has ever played. Maybe I'm biased because I love mythology, spirituality, etc. so her being a prophetess of "the divine" makes her awesome to me.
Another great thing is that they avoid the female characters from feeling like lame clichés. Shaw could easily have fallen into that mold considering how much of her character is based on killing and supposedly not having emotions. Thankfully the writing and acting keeps her very human instead of having her become a one dimensional cardboard power fantasy. Her sacrifice at the end is believable because we've always known there was more to her.