Watched the movie a second time, then watched clips from "The Aztecs" on Netflix....and the real Hartnell was certainly more vital
and vigorous than the way Bradley portrayed him. I mean, I loved the movie but Hartnell came across more as a doddering old man in it than he does in the actual episodes. Of course, The Aztecs was an early episode, right? So maybe that explains it. It was before he got run down and overworked.