So, it's no secret that Stranger Things Season 3 left us with a lot of unanswered questions. Netflix But arguably the biggest question was whether or not Hopper was actually alive. Netflix In case you need a refresher, Hopper heartbreakingly sacrificed himself in order to close the gate and save everyone else. Netflix In the final moments of Season 3 we saw a scientific base in Russia, and of course we've been theorizing about whether or not Hopper is actually there. Netflix Well, Stranger Things Season 4 just released a new teaser and officially revealed that Hopper is ALIVE and in Russia! View this video on YouTube Netflix / Via youtube.com The short but extremely meaningful teaser takes us back to Russia, where we see members of the military and several people working on train tracks. Netflix Then we get our first glimpse of Hopper, and I couldn't be more excited. Netflix He's cleanly shaven, and honestly, he looks like he's already thinking of an escape plan. Netflix I can't wait to find out how Hopper ended up in Russia, what they want with our favorite police officer, and, of course, when he'll return to Eleven, Joyce, and Hawkins! Netflix David Harbour shared the teaser on Instagram with the absolute perfect caption — and Maya Hawke even jumped in on the fun. Instagram: @dkharbour / Via instagram.com Basically, I'll be thinking about this 50-second teaser for the foreseeable future. Tap to play or pause GIF Tap to play or pause GIF Netflix Do you have any theories about how Hopper is alive and why he's in Russia? Tell us in the comments below!