I was under the impression when I watched this episode, that he was overcome by emotion, and that what might be perceived to be rudeness or indifference on his part was more likely to be the result of him fighting to keep his emotions in check. I have seen this sort of reaction - or rather, lack of reaction - in a friend who had searched for decades for his ancestors and was then handed something very significant. He was in the public eye a lot and guarded his privacy jealously when it came to his personal life, always playing his cards very close to his chest and in particular not revealing his feelings in case they were broadcast to the world at large. Could be the same for an actor? I think that if you did this long enough, it would become habit?
