A series of frustrating interviews with Birmingham politicians leaves Brian and Hamza wondering if crucial information about the Trojan Horse letter was kept from officials in London. Then one rainy Friday afternoon, Brian hears back from a government source who wants to meet right away. 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