I don't know. He kind of looks like the guy in Princess Bride (although it can't be him.)
The guy in Princess Bride is Wallace Shawn. Someone upthread told me that the actor playing one of the 'Wisemen" is Paul McLane. He played the part of Dr. Romano on "ER".I only watched that show a few times a few years ago, but I do remember him being on it.
That's another bald actor, Wallace Shawn....