This time around it's not just Will and the residents of Hawkins, Indiana that are in danger from malevolent forces seeping into our world form the Upside Down, it's the whole world. This time around the threat is too big for our original heroes to face alone, and new faces join up with Mike, Dustin, Lucas, and Will.
Along with peeks of Joyce Byers (Winona Ryder), Jonathan Byers (Charlie Heaton), Nancy Wheeler (Natalia Dyer), and Jim Hopper (David Harbour), Eleven (Millie Bobby Brown) makes her triumphant, bloody-nosed, telekinetic return. The Upside Down crosses over October 27. Watch, below.