Howard Bloom talks about his new book, The God Problem: How a Godless Cosmos Creates. We’ll take a look at why some psychotherapists are branding themselves to attract more patients—and what that means for the treatments they provide. Then Kristine Nielsen, David Hyde Pierce, and Sigourney Weaver discuss their roles in Christopher Durang’s latest comedy “Vanya and Sonia and Masha and Spike.” Plus, we’ll examine whether positive thinking is really the true path to happiness.