Serial is a new podcast produced by This American Life. It follows the murder in 1999 of high school student, Hae Min Lee, whose body was found almost a month later in the notorious Leakin Park, Baltimore. One person is lying. Is it her ex boyfriend, Adnan Syed, jailed for life, or his weed smoking friend, Jay? The evidence against Adnan seems often bizarre and thin, each week the show drawing on more and more fascinating detail. Sarah Koenig the presenter is forensic in her hunt for the truth. The show is addictive. So addictive that Slate is producing related pocasts - Slate's Spoiler Special, which I recommend you don't listen to until after you've heard the episodes, all of which can be found on the Serial website, with the next instalment - Episode 7 available Thursday.