Francis Walsingham - Elizabethan Spymaster

With pop culture staples like James Bond & Fletchly Park, there's a strong association of England and spies. But the tradition and association is older and deeper than we might expect. Enter Francis Walsingham, spy master for Queen Elizabeth I and he is determined to get rid of her enemy, Mary, Queen of Scots. But first, he needs to set up a smoking gun for Mary that will guarantee her execution. There's no protection against entrapment here is there?