Jefferson Mays is an American actor. He had his career beginnings in the 1990s, debuting in the film Ghost Brigade. He next acted in the movies The Low Life, Hudson River Blues, Cousin Bette, and The Big Brass Ring. He also portrayed James Madison in Liberty! The American Revolution and Elkanah Watson in Benjamin Franklin. In the 2000s, he had roles in the films Alfie, The Notorious Bettie Page, and How to Lose Friends & Alienate People. In the 2010s, he became known for playing Dr. Carl Rudnick in Law & Order: Special Victims Unit, Walter Taffet in The Americans, and George Hodel in I Am the Night. Other film roles were in Inherent Vice, Rebel in the Rye, and The Ballad of Buster Scruggs.