Stranger Things season 4 is poised to be the scariest season of the hit Netflix sci-fi series yet. This, according to star Joe Keery, who plays Steve Harrington on the show. The streaming service was quick to renew the show for another run of episodes following season 3's debut last summer. Now, Keery is teasing what fans can expect when the gang returns. Though, when that is going to be remains in the air for the time being.

Joe Keery was recently interviewed in honor of his new movie Free Guy, which is set to hit theaters in December. During the interview, the subject of Stranger Things naturally came up. While the actor couldn't get into specifics, he says creators Matt and Ross Duffer have pulled off something amazing. Here's what Keery had to say about it.

"Oh man, it's pretty amazing, the Duffer brothers have really done it again. I think that this year, and I know I say this every single year, but this is definitely going to be a lot scarier than prior years, because last year was pretty dark."

Season 3 left some major threads hanging that will need to be pulled when the show returns. Namely, the fate of David Harbour's Jim Hopper. A previously revealed teaser confirmed that Hopper is alive. Whether or not he's all that well is another question entirely. Joe Keery did say that he has indeed retired the Scoops Ahoy outfit, which was a big favorite from last season.

"I know that costume served its purpose and I'm glad to retire it [laughs]. Do I have it at home for Halloween? I don't, unfortunately. They won't let me have that one. One day!"

Season 4 had kicked off production in February and was up and running for about a month. Unfortunately, the widespread production shutdown that the industry has been dealing with extended to Stranger Things as well. There is no telling, at this point, when filming will be able to resume. That means the wait for the show's return could be longer than was originally intended. The Duffer brothers previously said that they envisioned the show running for about four seasons. Depending on how things go, that means season 4 could be its last. With that in mind, that wait may not be the worst thing in the world.

Stranger Things debuted on Netflix in 2016 and quickly became one of the biggest original hits for the streaming service. While details for season 4 largely remain under wraps, it was previously confirmed that the first episode will be titled The Hellfire Club, which may well be a reference to team the from the pages of Marvel Comics. Another previous report stated that at least four new characters would be introduced this season. We'll be sure to keep you posted as any further details are made available. This news comes to us via Games Radar.