What a smart, savvy show this is. Last week, it managed to put Alicia and Will (Juliana Margulies, Josh Charles) in the same courtroom, arguing different sides of the same case. And tonight, it finds a way to put two powerful mothers in the same room, in a rare and much-anticipated meeting between Alicia’s mother (played by Stockard Channing) and Peter’s mother (played by Mary Beith Peil). All that, and the newest cast member addition as well: Jason O’Mara (pictured), who made