Question: I heard that Eric Millegan (aka Zack Addy) might be coming back to Bones for one or two episodes. Is this true or just wishful thinking? —Brenda
Ausiello: Wishful thinking possibly caused by
excessive weed use. According to exec producer Stephen Nathan, “Because
of our scheduling and the current direction of our stories, Zack will
not be reappearing.”
Source: TV Line
Tipster: geraghtyvl