Stranger theories.

As “Stranger Things” gears up for its fifth and final season, Joe Chrest, who plays Ted Wheeler, reflected on a popular fan theory.

“Everyone I would talk to – especially the kids on the show – was pretty convinced that each year, they were going to find out that Ted was either in the CIA, or in cahoots with the Russians,” Chrest exclusively told The Post.

Created by the Duffer brothers, the Netflix mega-hit premiered in 2016, and will end with Season 5.

Set in the ‘80s, the sci-fi show is set in Hawkins, Indiana, following various characters such as Mike (Finn Wolfhard, 22) and Nancy (Natalia Dyer, 30) as they deal with supernatural threats from a shadowy dimension called The Upside Down.

Ted is Mike and Nancy’s dad who can often be seen sprawled in front of the

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