[Warning: The following contains spoilers for Episode 7 of Stranger Things Season 4 Part 1. Read at your own risk!]
Stranger Things Season 4 introduces a slew of new characters, from Joseph Quinn's Eddie Munson — the head of Hawkins High's Hellfire Club, to Robert Englund's Victor Creel — a man imprisoned for murdering his family in 1959. And while a handful of the new characters reside in Hawkins, we also meet someone on the other side of the world: Dmitri, a prison guard in Russia. Portrayed by Tom Wlaschiha, Dmitri becomes a key character in Hopper's (David Harbour) story this season. He devises a potential way out for the imprisoned police chief — but for his own gain.
We first meet Dmitri when he speaks on the phone with Joyce (Winona Ryder). The prison guard previously sent a mysterious note to Joyce, saying that Hopper is alive. And he signed off the note with the name "Enzo" — a nod to the Hawkins restaurant that Joyce and Hopper were going to dine at for a date. After Dmitri tells Joyce he is Enzo, he asks for a deposit on Hopper's ransom payment. At the same time, Dmitri lets Hopper know of an opportunity for escape.
So why does Dmitri look so familiar? That's because the actor Wlaschiha starred as Jaqen H'ghar in Game of Thrones. To refresh your memory, Jaqen was one of the Faceless Men of Braavos — a group of highly skilled assassins. Jaqen took Arya Stark (Maisie Williams) under his wing, and she trained rigorously to become "no one." It's through this training that Arya became an ace killer who was able to murder while concealing her own identity.
By the end of Stranger Things Season 4 Part 1, Dmitri has teamed up with Hopper. His plot to exchange Hopper for money was exposed by Yuri (Nikola Djuricko), and he's now imprisoned for being a traitor. Dmitri and Hopper successfully escape the Demogorgon in the prison, but it's unclear how they will escape the prison itself.
Stranger Things Season 4 Volume 1 is available to stream now.