The end of season three of Stranger Things left just one question lingering: Is Hopper still alive? I mean, we all knew that they'd bring him back, although David Harbour wasn't 100 percent certain himself. The teaser for season four set in Russia leaves no doubt.

From Russia with love... pic.twitter.com/ZWEMgy63Et

— Stranger Things (@Stranger_Things) February 14, 2020

I hope this doesn't mean that the entire cast is going to Russia -- or rather, the Soviet Union? Because that would be weird. Would they all take their bikes, too?

Season four of Stranger Things will return whenever Netflix feels like it. But also, probably this summer.