Episode 2.03: You Can't Rewrite History

We're back in the Hartnell era, tackling a story that changed Who history by asserting that Who can't change history, and so created a precedent that shaped everything thereafter. But how much does the Aztecs change history itself? Released under CC-BY-NC-ND 4.0 (https://creativecommons.org/licenses/by-nc-nd/4.0/)