In early 1900s New York, a cook named Mary Mallon moved from one wealthy household to another while typhoid followed in her wake. This episode begins the story of “Typhoid Mary”: the Irish immigrant cook who seemed perfectly healthy, the baffling outbreaks that struck rich families instead of slums, and the medical investigation that changed public health history by identifying one of America’s first known asymptomatic carriers.

Part one follows Mary’s rise as a private cook, the trail of typhoid cases linked to her kitchens, George Soper’s hunt to prove she was spreading the disease, and the explosive confrontation that ended with her forced quarantine on North Brother Island. It’s a story about disease, class, immigration, fear, and the moment modern epidemiology collided with one woman’s life.

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