During the dark years of American Prohibition, when liquor was outlawed south of the border, Canada became a lifeline for thirsty U.S. cities—and a breeding ground for organized crime. Distilleries and breweries that remained legal in parts of Canada turned into suppliers for rum-runners who smuggled whisky and beer across the Great Lakes, down the Detroit River, and through hidden coastal routes under the cover of night. Fortunes were made, reputations ruined, and violence often followed as gangs fought for control of the lucrative trade. For lawmen, rum-running was nearly impossible to contain; for smugglers, it was an empire built on speedboats, bribes, and blood. This episode traces how Canada’s shadowy role in the Prohibition era fueled cross-border crime and left a legacy of intrigue that lingers to this day.