I think my biggest problem with the episode is not the physics, but the fact that Flint was so many famous, brilliant, talented people in his lifetime. It almost seems like he was the ONLY brilliant, talented human in history. It belittles Brahms, DeVinci, et al., and kinda belittles the human race in general.
Ok, so he was Brahms (whose reputation is inflated due to the old "Three B's" meme). But he was NOT 50 other great composers we could name in a couple of minutes. And he was DaVinci, but not Michelangelo, Raphael, Donatello, Bernini, whoever. I'm fine with it. Again: Cool 60s TV, way cooler than most stuff that hit me in the '70s, thus it has my love and allegiance. Irrational, but true.