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Dark Angel on Masterpiece

Sunday, May 21, 9pm: Joanne Froggatt stars in this spine-tingling drama about the notorious Victorian poisoner Mary Ann Cotton, Britain’s first female serial killer.

Dark Angel on Masterpiece

Joanne Froggatt, who stole the hearts of millions of viewers as Anna, the loving and resilient lady’s maid on Downton Abbey, stars in a totally different role in this spine-tingling drama. Dispensing death from the spout of a warm teapot, Froggatt plays the notorious Victorian poisoner Mary Ann Cotton, Britain’s first female serial killer.

Watch a preview: