Watch Series: Dark Angel Released in (2016) - Season 1 produced by UK, The TV Series categorized in Crime, Drama, Mystery, Thriller, and content rating 12 with duration 60 min broadcasted as these networks ITV, ITV1, Streamed at Putlocker & directed by Brian Percival. The story of Victorian serial killer Mary Ann Cotton, a poisoner whose methods leave no visible scars, allowing her tally of victims to mount, unsuspected by a Victorian society unable to conceive of a woman capable of such terrible crimes. Traveling around the North East, she insinuates herself into unsuspecting families, marrying and creating new families of her own - before killing them, taking their money and moving on. - Season 1