Doppelganger

"Doppelganger" is the upcoming fifteenth episode of the sixth season of Arrow, and the one-hundred-thirtieth episode overall.

Synopsis
Oliver and Thea are shocked to hear that Roy Harper is back in Star City. However, when they discover the circumstances of Roy's return, Oliver and Thea realize that Roy is in trouble and jump in to save him. Black Siren makes a shocking decision.