This is a terribly sterile, unsexy and over-scripted series rescued - at times - by Megan Follows as the manipulative Catherine de Medici but otherwise having little to recommend it to anyone. Based, very loosely, on the early life of Mary, Queen of Scots (Adelaide Kane) at the court of King Henry II, where she has been betrothed since an infant to the Dauphin (Toby Regbo). The series uses a considerable degree of…