Every day, across the planet, blood and plasma donations save human lives. Yet as with virtually all medical innovations, the story of blood donation has a dark side. In tonight's episode, Ben, Matt and Noel dive into the disturbing tale of a conspiracy spanning decades -- how an Arkansas prison profited from selling tainted inmate blood across the world, infecting an unknown number of people with insidious diseases. Yet there's a protagonist to this twisted narrative: it's also the story Kelly Duda, the courageous investigative journalist who spoke truth to power and brought this injustice to the public eye.