Because I found fandom almost before I watched the first episode, it's hard for me to recall exactly when I knew they would be something beyond special. In terms of actually watching and getting a sense of the power of the love first hand? It was probably the prom dance. Not that I didn't see it building before then, and I certainly believed it would be there. But that moment, when it's just the two of them on the floor, so happy, and the way they look at each other like they are the only two people in the world - yeah, then.