The new HBO docuseries The Case Against Adnan Syed premieres this Sunday, promising to shed some light on one of the most infamous true-crime stories of the 21st century. Its a tale thats already formed the basis of the mega-hit podcast Serial-which in turn spawned a veritable boom of similarly themed shows-and become something of an obsession for Internet sleuths, and the new show will surely only reignite that still-raging debate. Heres a quick primer on everything you need to know going in...