Elizabethan scholar Dr. John Dee was one of the most learned men of the 16th century, applying his intense mathematical intellect to matters scientific, political, alchemical and occult. He advised Queen Elizabeth, sought communion with angelic beings, advocated British expansion and plunged the depths of human knowledge in age of great change. In this second of two episodes on the topic, Robert and Christian discuss Dr. Dee’s involvement in science, statecraft, cryptography and espionage.