Joanne Froggatt, who stole the hearts of millions of viewers as Anna on "Downton Abbey," stars in a totally different role in this spine-tingling drama - the notorious Victorian poisoner Mary Ann Cotton, Britain's first female serial killer.
AZPM is a service of the University of Arizona and our broadcast stations are licensed to the Arizona Board of Regents who hold the trademarks for Arizona Public Media and AZPM. We respectfully acknowledge the University of Arizona is on the land and territories of Indigenous peoples.