In one of its final episodes of the year, The Walking Dead just introduced the villains that will shape the back half of its ninth season.Famous comic book antagonists The Whisperers have finally been introduced into the show after years of debate and their arrival could be its most creepy yet – but who are they? Warning: spoilers below Essentially, the Whisperers are humans who prowl the landscape dressed in walker skin in order to catch their victims unawares. This would explain the latest episode’s final scene, which saw Jesus slain in combat with what he believed to be the undead. Instead, Aaron, Daryl, Eugene, Michonne and Alpha watch on in horror as a walker ducks, grabs his sword and murders the long-haired warrior in cold blood.“You are where you don’t belong,” his murderer whispers as Jesus – real name Paul Rovia – slumps to the floor. Moments later, Daryl avenges his death and realises the body is a human wearing a stitched-up walker mask. Just two weeks ago, Rosita (Christian Serratos) and Eugene (Josh McDermitt) came across the herd of the undead who could seemingly speak actual words.Keen-eyed viewers think they noticed a hint of their arrival in the season eight finale, which aired earlier this year. As Rick Grimes (Andrew Lincoln) led his group to their final showdown with Negan (Jeffrey Dean Morgan), a huge horde of walkers in the distance could be seen beyond a series of poles which, to the uninitiated, seemed like nothing at all.