This episode was a basic case of the week, with a lot of convolution, so it was nice to have that little teaser bit of character development we're accustomed to with the show. The obvious one that we know must come to pass (going out of the library on his own) and the less obvious and more substantial (calling Riley bad code).
Oh man, that was my adrenaline moment of this episode. It was smoothed over at the end in that little bit of banter between Reese and Finch, but damn was it heart-stopping when Finch spit it out. It shows how deeply Root affected him, because until now, he's just had the terrified face on. Even if he was against the situation and claims to be against her, something stuck, whether he likes it or not. Now, I think it was executed a little sloppily, but for what it's saying, I'll take it.
Keep bringing the awesome episodes!