Warning: This article contains spoilers from Sunday’sLovecraft Country, titled “Holy Ghost.”

Lovecraft Country’s take onPoltergeisttook a toll onJurnee Smollett.

Thus, an exorcism was called for.

Lovecraft Country

Credit: Eli Joshua Ade/HBO

The entire sequence left both Leti and her portrayer emotionally drained and breathless.

“It’s really an exorcism of Leti,” Smollett tells EW.

“There’s a vibration that happens in your body.

“It’s what you seek out as an artist.

“There was a very humbling awareness that we’re part of something that’s bigger than us.

That this story is not about one part or one person, it’s about the collective.

Having that awareness makes you want to give your entire being to it so that do it justice.”

Lovecraft Countryairs Sundays at 9 p.m. on HBO.