Ross Duffer

The fourth season of the Duffer brothers' nostalgia-driven sci-fi hit promises to answer a key question: what exactly happened to Eleven and Hopper?

Eleven and her friends must once again contend with the Upside Down, as well as an all-new terrifying beast hiding in plain sight, in the third season of Netflix's '80s-set sci-fi thriller series. Dustin and Steve snoop around for a secret Russian military facility that might be hiding inside their town's new shopping mall while Hopper suspects the mayor of being an accomplice.

The second season of Netflix's '80-set sci-fi takes place one year after the terrifying events of The Demogorgon. With Eleven kept under the secretive and watchful eyes of Hopper, the young lads prepare for Halloween and prom. However, when Will experiences a frightening vision, they find a new monstrous entity waiting in the Upside Down.

The first season of Netflix's nostalgia-fuelled sci-fi series follows a group of young Dungeons and Dragons-loving teenages in 1980s small-town America who come across a frightening supernatural discovery—a portal into another world. When their friend finds himself trapped in this frightening realm, their only hope of finding him lies in the hands of an escaped test subject—an elusive girl with extraordinary powers.