Clive Owen Dr. John Thackery Actor, Executive Producer André Holland Dr. Algernon Edwards Actor Eve Hewson Lucy Elkins Actor Jeremy Bobb Herman Barrow Actor Juliet Rylance Cornelia Robertson Actor Michael Angarano Dr. Bertie Chickering Jr. Actor Chris Sullivan Tom Cleary Actor Cara Seymour Sister Harriet Actor Eric Johnson Dr. Everett Gallinger Actor David Fierro Jacob Speight Actor Grainger Hines Capt. August Robertson Actor Arielle Goldman Genevieve Everidge Guest Star Steven Soderbergh Director, Executive Producer Jack Amiel Writer, Executive Producer Michael Begler Writer, Executive Producer Gregory Jacobs Executive Producer Michael Sugar Executive Producer Michael Polaire Producer