Stranger Things Season 4 New and Returning Cast
Stranger Things Is Getting New Cast Members For Season 4 — Get the Full Rundown
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German actor Wlaschiha joins the cast as Dmitri, a prison guard in Russia who befriends — you guessed it — Hopper. He's clever and charming, but whether or not he can be trusted remains to be seen. Wlaschiha is best known so far for playing assassin Jaqen H'ghar on Game of Thrones.