Sam Waterston is an absolute legend that you almost certainly know from something. He's been nominated for an Oscar for Best Actor for The Killing Fields. He played Nick Carraway in the 1974 Great Gatsby with Robert Redford, and TV fans have likely seen him before on either The Newsroom, Grace and Frankie, or, you know, more than 350 episodes of Law and Order. Here, Waterston plays George Shultz, a nonagenarian former Secretary of Defense who was drawn to Elizabeth Holmes, eventually investing in Theranos and joining the company's board.