This week, a high-profile witness from Elizabeth’s superstar board of directors surprises the courtroom by taking the stand: 4-star general and former U.S. Secretary of Defense James Mattis. He speaks of being dazzled by the potential of Theranos’ devices on the battlefield and the disillusionment he felt when the full story came to light. Plus, we meet a patient whose Theranos test results led to a terrifying ordeal.