Conor Friedersdorf, Tanya Basu, and Katie Kilkenny discuss the latest episode of WBEZ Chicago's popular non-fiction podcast Serial. Friedersdorf: The final episode of Serial's first season, "What We Know," was strong: Over the course of 55 minutes, we heard some new information, including interviews with sources who only recently agreed to speak with Sarah Koenig, and got a review of the most important evidence aired to date.