"When I first was invited to come for ['USS Callister'], it was my favorite show," Simpson said of Black Mirror in a Zoom interview with Mashable ahead of the Season 7 debut. "I couldn't believe it. And I had the exact same feeling [coming back for 'USS Callister: Into Infinity' ]."

Jimmi Simpson is stepping back into the role of Walton for Black Mirror's "USS Callister — Into Infinity," the highly anticipated sequel to the Emmy-winning episode that originally aired in 2017. Simpson says this new chapter isn’t just a continuation — it’s essential.

Jimmi Simpson is no stranger to sci-fi. He's appeared in Westworldand Dark Matter. And now, he's back on the digital bridge of the Callister. Last we saw Simpson's character, Walton (or rather, the clone version) seemed to have died sacrificing himself for the rest of the crew.