Journalists Sheera Frenkel and Terrence McCoy discuss their investigations into the rise of fake news, the people behind it, the people who share it and why it went viral. Philosopher and scuba diver Peter Godfrey-Smith investigates the remarkable intelligence of cephalopods. In “All We Had,” Katie Holmes stars as a the young mother of a teenage daughter. Journalist Seth Freed Wessler argues that we’re poised for a new era of explosive private prison growth and deportation under a Trump presidency.