McCarthy chronicles the rise and fall of Joseph McCarthy, the Wisconsin senator whose zealous anti-communist crusade would test the limits of American decency and democracy.

Based on the book The Woman Who Smashed Codes: A True Story of Love, Spies, and the Unlikely Heroine Who Outwitted America's Enemies, The Codebreaker reveals the fascinating story of Elizebeth Smith Friedman, the groundbreaking cryptanalyst whose painstaking work to decode thousands of messages for the U.S. government.