Union organizer David Rolf, who led the campaign to raise the minimum wage in Seattle, discusses his book The Fight for Fifteen. Jeremy Irons and director Matthew Brown talk about their new film “The Man Who Knew Infinity,” which tells the true story of Ramanujan, a math genius in the early 20th century. Treat Williams stars in “The Congressman,” written and directed by former U.S. Congressman Robert Mrazek. Danish journalist Klaus Wivel discusses his book The Last Supper: The Plight of Christians in Arab Lands.