Even without him knowing it, he is working for Fulcrum during the development of their version of the Intersect, as he was one of the original team that developed the first Intersect alongside Orion. Chuck later accidentally shot Busgang in the leg when Chuck attempted to rescue Casey and Sarah. Busgang subsequently escaped to a hospital and limps his way to his lab to grab all his money before going into hiding as Fulcrum would be looking for him. Seen solely in "Chuck Versus the Lethal Weapon".