This was so heartbreaking. He was the same man who had just said those words on the phone, he remembered saying them. And to have her stand there and look at him like she had no idea who he was, seeing her reaction to his phone call, to watch her respond to his call with such love, yet look at him standing before her as a stranger...it was so sad.
My theory is that the round things remind him of Gallifrey (circular Gallifreyan) and thats why he likes them. But where did he put them? Where did he put his beloved Gallifrey?<~~~ooooo, one smart cookie