Last year, "Stranger Things" took the world by storm when it hit Netflix in July. As the fall TV season fast approaches, the eagerly anticipated new season is set to bring forth an expansion of the world that fans have come to know in the first season.

David Harbour, who plays Chief Jim Hopper on the series, already hinted at how different the sophomore season will be from the first and how it will further expand their world and introduce "new concepts" in the show. He also likened both seasons to vanilla and strawberry ice cream, saying that some fans may end up disliking the upcoming season.

Speaking of the upcoming season, the show will welcome several new faces to the sleepy, weird town of Hawkins come October. There's the addition of Sean Astin as Bob Newby, Paul Reiser as Owens, Brett Gelman as Murray Bauman, Will Chase as Neil Mayfield, and Linnea Berthelsen as Roman, who viewers will get to know when "Stranger Things" Season 2 debuts this October 27.

Season 3 already on the horizon for the Duffer brothers

"Stranger Things" has proven to be wildly successful among viewers and critics alike. In fact, it recently earned as much as 19 nominations for the 2017 Emmy Awards ceremony this September. This includes Shannon Purser for her role as Barb. It seems that justice will definitely be served this time.

With the show's massive success, it's highly unsurprising if Netflix would renew it for a third season. But creators the Duffer Brothers aren't counting on overstaying their welcome.

They recently spoke to Collider, saying that they already have a clear idea on what story to tell and how long the show will run for if they're blessed to be renewed once more.

The Duffer brothers explained that in "Stranger Things" season 2, they've laid the "groundwork...for what would be the arc for the rest of the show," but they're just not sure yet on how many seasons they'd like it to last.

David Harbour said something along those lines as well, as he recently told TVLine that there's an end in sight for the characters on the show.

He explained, "We’re going to get out before we’ve worn out our welcome. We have a specific story that we’re going to tell."

Duffer Brothers: Quality over quantity

For "Stranger Things" creators Matt and Ross Duffer, they're not so much into how many seasons the show will run, but how good the seasons actually are. They admitted that they recognize the agony that fans have to go through to wait for a new season, but they explained, "it’s about quality control too." "Stranger Things" season 2 premieres on Netflix on October 27.