‘Stranger Things’ star Jamie Campbell Bower says final season will be ‘completely insane’

It’s all upside down. 

“Stranger Things” star Jamie Campbel Bower said that the fifth and final season is shaping up to be stranger than ever. 

“If you thought last season was nuts, this season is just out of control, wild — like, it’s bonkers. It really, really is,” he said on iHeart’s “I’ve Never Said This Before with Tommy DiDario” podcast, in a clip from Tuesday’s episode obtained by the Hollywood Reporter on Monday. 

“It’s bigger. It’s just completely insane,” he added. 

Campbell Bower, 35, has played Vecna, the “Stranger Things” villain introduced in Season 4. As the season showed, he began as a regular human named Henry Creel but later became “001,” the first child test subject in the same experiments that Eleven (Millie Bobby Brown) was part of. 

He was also an orderly in the lab who initially seemed friendly toward Eleven — until his evil origins were revealed. 

Season 5 will be the end of the hit Netflix show, which is set in 1980s Hawkins, Indiana, and follows a group of friends – including Eleven, Mike (Finn Wolfhard), Will (Noah Schnapp), Steve (Joe Keery), Nancy (Natalia Dyer), Hopper (David Harbour) and perpetually frazzled mom Joyce (Winona Ryder) – as they deal with mysterious supernatural events, government experiments and a sinister parallel world known as “The Upside Down.” 

According to the Hollywood Reporter, Campbell Bower further said on the podcast that Season 4 events were easy to keep track of, but in Season 5, it’s been harder to grasp what’s happening. 

But he said he went to see the “Stranger Things” play in London to help get his bearings. 

Called “The First Shadow,” the play is set in 1959 and follows younger versions of Joyce Byers (Ryder), Bob Newby (Sean Astin) and Jim Hopper Jr. (David Harbour) as a younger Henry Creel moves to Hawkins, Indiana. 

“It’s just continually building,” Bower said, referring to Season 5. 

“It’s been really interesting as well to have the play in London, which I went to go and see, which goes back to Henry before we met him in Season 4. And to have a lot of the questions or a lot of the thoughts that I had about that character kind of answered by watching the play and also discover more, was really interesting for me.”

Bower, who also appeared in big franchises like “Harry Potter” and “Twilight,” said that although the final season has been in production since January, there’s still a lot more to do. 

“Stranger Things” Season 5 has not yet announced a premiere date on Netflix.