“Watershed” is a study in opposing forces. There are those who talk about how incredible this job opportunity is for Beckett and there is Castle inadvertently reminding her how incredible they are together. If there’s a single image from the show that can best represent this episode, it would be the moment when Beckett tosses out the coffee that Castle gave her the day before and it splashes violently across the divide of the sink, dashing both sides of the sink with the symbolic imagery.
This is the divide, a branching of choices that will change everyone’s lives for better or worse. (See what I did there?)
“Watershed” is perhaps the most introspective episode we’ve ever gotten. Interestingly, for an episode so heavily centered on where Castle and Beckett’s relationship is going, a large bulk of the significant progress occurs during conversations with their respective confidantes. I’m going to walk through this nearly scene for scene because this is one of those rare episodes where almost every moment is significant.
THIS IS EXCEPTIONAL.