Starz has had its fair share of historical dramas in its original programming lineup. Of course, there’s the network’s popular adaptations of “Outlander” and “Dangerous Liaisons.” But Starz also has original series based on aristocratic figures, like “Becoming Elizabeth” and “The Serpent Queen.” Here’s another to join that list: “Mary & George,” a new series that charts the rise to power of the cunning Mary Viller, Countess Of Buckingham and her son, George.