Adelstein will reprise his role as Leo Bergen, Sally Langston's (Kate Burton) ambitious and ethically questionable campaign consultant, in an upcoming episode of the current season four, reported Ace Showbiz.
Adelstein recurred in season three. His character Bergen was last seen in the third season finale. He's set to appear in at least one episode in November. It's unclear if Adelstein's return means Burton will also reprise her role.
Adelstein will next star on Bravo's new drama comedy series "Girlfriends' Guide to Divorce", playing the husband of Lisa Edelstein's lead character Abby.