Joanne Froggatt’s ‘Dark Angel’ to Air on Masterpiece in 2016 Joanne Froggatt’s next project after Downton Abbey is kind of…against type. Best known for playing the beloved, long-suffering Anna Bates, Froggat will next take on the role of infamous Victorian poisoner Mary Cotton in an upcoming two-part drama By Lacy Baugher filed under Drama on 1/22/2016
