Richard Thomas is best known for his starring role as John-Boy Walton in the iconic television drama The Waltons, for which he won an Emmy Award and received multiple Golden Globe Award nominations. He is most recognizable to contemporary television audiences for his role as Nathan Davis in the series Ozark, as well as FBI Special Agent Frank Gaad in the series The Americans and his performance as Sanford Bensinger in the series Billions. He was also seen recently on television in the limited series Tell Me Your Secrets and on film opposite Sandra Bullock and Viola Davis in The Unforgivable. His feature film performances include Curtis Hanson's Wonder Boys, Tim Blake Nelson's Anesthesia, and Ang Lee's Taking Woodstock. Thomas received a Tony Award nomination for his performance in the recent Broadway revival of The Little Foxes. He has been seen in acclaimed performances on stage including The Great Society, You Can't Take It With You, Race, Democracy, Incident At Vichy (Drama Desk Award nomination), The Stendhal Syndrome (Lucille Lortel Award nomination, Outer Critics Circle Award nomination), A Naked Girl On The Appian Way, An Enemy Of The People, Tiny Alice, The Front Page, The Fifth Of July, innumerable Shakespeare productions, and his professional debut at 7 years old in Sunrise At Campobello. He has starred in the national tours of the award-winning productions of The Humans (Elliot Norton Award) and Twelve Angry Men. Thomas currently stars as Atticus Finch in the national tour of To Kill A Mockingbird.