T.R. Knight joins joins the cast for 11/22/63. Knight will play Johnny Clayton, a salesman in 1960s Texas who can't quite break up with his estranged wife, Sadie Dunhill (Sarah Gadon), even as she falls in love with Jake. Charismatic but controlling, Johnny confronts Jake in a tense encounter that puts Jake's double life at risk. But there's equal danger in what will happen if Jake and Sadie expose Johnny's own secrets.