For me, it's not about Belle, although I love her in this episode, it's the angst we see in Rumple and Gold. The scene where Gold destroys his shop juxtaposed with Rumple destroying his china.... gets me every time!
That, and what's going on with Regina. Her whole elaborate ruse just to ask Gold a simple question.... perfect! It was the confirmation of something we'd suspected for a long time - GOLD REMEMBERS!!!! That scene is just perfect.
Then, we learn Regina has Belle in reserve. This episode says so much about Regina and I love every second of it.