This week on The Treatment, Elvis welcomes back Bill Hader, the Emmy-winning actor and co-creator of the HBO series “Barry,” which is now in its fourth and final season. Next, “Showing Up” director Kelly Reichardt and her frequent collaborator, Oscar-nominated actress Michelle Williams, sit down to talk about their film about a sculptor with drama in her personal relationships. And for The Treat, “Party Down” star Adam Scott explains why a gender-bending movie from 1982 is close to “perfect.”