Physicist Brian Greene discusses the possibility of multiple universes! Then, Victor Garber and conductor James Bagwell talk about a revival of Kurt Weill’s "Knickerbocker Holiday." Also, New Yorker editor-in-chief David Remnick puts President Obama’s State of the Union Address into perspective. Plus, New York Times journalist Dave Itzkoff tells how his father’s problems with drugs shaped his life. And we’ll learn how bail bonds work—and some of the social justice issues that result from the current bail system.