Hidden Human History

You may be looking for the comic story.

Hidden Human History, sometimes abbreviated as H3, was a weekly podcast that ran on Earth sometime in 2018 that talked about historical events, hosted by Bethany Brunwine. Subjects talked about on the show included, but were not limited to, famous serial killers and "wars you don't learn about in school". It had been running for roughly a year before the Thirteenth Doctor arrived in Sheffield.

The show was enjoyed by the Doctor's companions. Graham O'Brien recalled how Grace had it playing around the house all the time. Ryan Sinclair began listening at the insistence of his grandmother, while Yasmin Khan was turned onto it by a friend at work. Yaz praised the show as being "really well done", and that it felt more like "historical gossip" than "sitting in a lesson". Ryan later admitted that it took a little while for the show to get its "polish", and that the earlier episodes were a "bit dull".

When the Thirteenth Doctor brought Team TARDIS to Guelder in the early 16th century, Yaz, Ryan, and Graham all identified it as being around the time the Guelders wars took place, as they'd learned from the podcast, much to the Doctor's amazement, and jealousy.

After stopping a horde of Stilean flesh eaters from attacking Guelder, the TARDIS next brought the crew to North Carolina in 1711, and the sight of Cary's Rebellion, yet another event the Doctor's companions knew about from the show. Ryan pointed out how weird it was that the TARDIS had visted "two H3 episodes in a row". (COMIC: Hidden Human History)