Deadline is reporting that NBC drama pilot Langdon has added Sumalee Montano (How to Get Away with Murder), Arrow alum Rick Gonzalez, and Shots Fired‘s Beau Knapp.
Montano will play Sato, Director of the OS. Gonzalez is set as uniformed Capitol policeman Nunez. Knapp portrays Mal’akh, who takes Langdon on a dangerous and arcane mission. They join a cast that also includes Eddie Izzard (The Riches) as Smithsonian director Peter and Valorie Curry (The Tick) as Katherine, a scientist.