In this chilling 2-part drama, Joanne Froggatt stars as serial killer Mary Ann, 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.

The chaotic and violent struggle to control wealth and power in the North American fur trade in the late 18th century. Told from multiple perspectives, Frontier takes place in a world where business negotiations might be resolved with close-quarter hatchet fights, and where delicate relations between native tribes and Europeans can spark bloody conflicts.