Oscar winner Anjelica Huston is being summoned back to Medium to reprise her role as Allison's ex-boss, Cynthia Keener, later this season. Additionally, Arrested Development patriarch Jeffrey Tambor will play a mysterious man who shows up at the Dubois house in a May episode.

http://ausiellofiles.ew.com/

That's interesting news. I thought her storyline was done and over with since last season, but I guess not.