Dr. Jon Snow -- no relation to the guy from A Song of Ice and Fire -- was in a pickle. Cholera was ravaging London, particularly in the Soho area, and no one knew how to stop it from spreading like poisonous wildfire. As the crisis raged on, Snow was able to use his medical knowledge and amateur detective skills to figure out where the contagion was coming from. His big breakthrough? Folks at the local brewery, who were known for day drinking, seemed to avoid the infection almost entirely. Tune in to learn how beer (kind of) saved London.