Johnson appeared as Caleb Calhoun, the estranged brother of Norma Bates (Vera Farmiga), in the A&E drama-thriller series "Bates Motel". He recurred in the second season, became a main cast member for the third season, and guest starred in the fourth and fifth seasons. He was then a recurring cast member in the fifth season of "Covert Affairs", playing former CIA paramilitary operative James Decker. Johnson co-starred in the 2015 thriller film "Solace". In August 2015, it was reported that Johnson would be part of the main cast for the second season of ABC's anthology series "Secrets and Lies".