From Serial Productions and The New York Times, Serial Season 4 is a history of Guantánamo told by people who lived through key moments in Guantánamo’s evolution, who know things the rest of us don’t about what it’s like to be caught inside an improvised justice system. Episodes 1 and 2 arrive Thursday, March 28. Our newest podcast, “The Preventionist” is out now. Search for it wherever you get your podcasts. To get full access to this and other Serial Productions and New York Times podcasts on Apple Podcasts and Spotify, subscribe at nytimes.com/podcasts. To find out about new shows from Serial Productions, and get a look behind the scenes, sign up for our newsletter at nytimes.com/serialnewsletter. Have a story pitch, a tip, or feedback on our shows? Email us at serialshows@nytimes.com