Everyone knows the story of Helen Keller at the water pump — the moment Anne Sullivan spelled "water" into her hand and the blind, deaf girl understood language for the first time. Almost nobody knows what happened next: Keller became a radical socialist, a suffragist, a labor organizer, an anti-war activist, and a co-founder of the ACLU. The inspirational childhood story is where most accounts stop, because the adult Keller's politics made powerful people uncomfortable.

This episode traces Keller from the water pump breakthrough through her Harvard education, the radical political awakening that followed, and the decades of activism that the sanitized version of her story deliberately erased.

• The childhood illness, the wild years before Sullivan, and the water pump breakthrough
• The Radcliffe education and Keller's emerge ...