The rabidly-awaited of True Detective season two airs on HBO this Sunday (with a repeat on Monday for fans in the UK), and will surely draw huge numbers thanks to its star-studded cast - and the success of its initial run. Nic Pizzolatto's crime drama drew immense critical acclaim when it hit screens in early 2014, managing to be simultaneously gritty and spectacular as it told the tale of two mutually-loathing police detectives on the trail of a nightmarish Louisiana cult. But Pizzolatto and co. have taken a huge risk in ripping up their successful formula and starting all over again, banishing McConaughey, Harrelson, and its haunting deep south setting to the past. The new season promises an entirely different location and a set of new (but similarly renowned) stars in the form of Colin Farrell, Vince Vaughn and Rachel McAdams. Could this be a catastrophic mistake? Although the build to Sunday's premier has set fans' pulses racing, several potentially key flaws have been revealed along the way - chinks in the True Detective armour that could tarnish the series' much-admired legacy. Here are seven big reasons True Detective season two won't live up to the hype, especially after such a well received initial outing.