With its slew of memorable characters, retro soundtrack, and wholly original plot, Netflix’s Stranger Things burst on to the television scene last summer and charmed audiences worldwide. The show quickly rocketed towards the top of the list of the year’s best television series and fans continue to speculate what the future has in store for their favorite characters. The season finale raised some big questions for the show’s next installment – what really happened to Eleven, anyway? And what was with Hopper getting into that mysterious black car?

Unfortunately, fans have to wait a little longer this year to catch the continuation of the Stranger Things story, with Season 2 premiering later in the fall rather than over the summer. In the meantime, viewers have had to rely on the small amount of footage that was provided earlier this year in the first Season 2 teaser trailer that premiered during the Super Bowl. Fortunately for those fans eager for any news about Stranger Things, David Harbour (who plays Police Chief Jim Hopper on the show) recently revealed some information surrounding the show’s upcoming sequel season.

Heroic Hollywood reported on how Harbour talked at length with Nerdarchy, a Youtube channel geared towards fans of role-playing games. While most of the chat was centered on the game Dungeons & Dragons, the Stranger Things star divulged some interesting facts concerning what to expect from Season 2, his character Hopper, and working with the show’s creators, the Duffer Brothers.

When asked to describe how the next season will compare to Season 1, Harbour touched upon the show’s ability to expand its world now that Netflix has developed interest in maintaining the show for multiple seasons. “In terms of this season, we’re able to know that we have a couple more seasons ahead of us, and so we start to create a really broader palette,” Harbour explains.

Continuing his explanation about the wider scope of Season 2, Harbour drops some interesting hints about what viewers will come to learn about the mysterious, otherworldly plane of existence introduced in Season 1, the Upside Down. “The [Duffer] brothers have this document about the Upside Down, this huge document where they know all about it, but we’ve really only teased in Season 1,” Harbour says. “So we start to really go into this bigger world about what the Upside Down is, what it means, what its significance is, what exists in it, whether or not it has sentience, or what it’s there to do – and that’s exciting.” Some of the prospects that Harbour raises here are both exciting and terrifying – the Upside Down might not simply be another world – it might even be self-aware.

As for his own character, Harbour is eager for fans to see where Season 2 will take Chief Hopper. The actor states, “We’re able to go a lot further into his character which I’m really excited about. Hopper starts to get to reveal a lot more things about himself and a lot more of really who he is, which we started to touch on (in Season 1). …We start to sort of see more about who he is as a man in this season, and that’s really exciting.”

Season 2 of Stranger Things will premiere this Halloween on Netflix.