Andrea Yates shocked people around the world when it was revealed that she drowned her five children in a bathtub in June 2001. More than two decades later, the reasoning behind the crime will be explored in Investigation Discovery's latest docuseries The Cult Behind the Killer: The Andrea Yates Story. Us Weekly breaks down everything you need to know about the new true crime docuseries, including what it's about, when it premieres and more about the tragic case.