Wow, this is gorgeous. I didn't think much about that scene during the episode (preoccupied with other things I guess) but this is a fascinating look at it. I love the structure of the fic, the quotes then the details that follow. And second person fics are extremely hard to get right, but you mastered it.

You’d never really noticed before, but Sam is a bit of a map whore.
Hee, loved it!