Fun fact, that Demogorgon that Hopper kills is actually from Season 1. Remember in Season 1 it was never confirmed that the Demogorgon died, it just disappeared alongside El. El did this same thing to Henry, it never killed Henry just made him disappear sending him elswhere. This Demogorgon that has been eating and feeding on Russian inmates is from S1 and it's pretty cool seeing the full circles. Cause both kids and teens got to fight this Gremlin but the adults (Hopper and Joyce) never did and now they finally got to. The same Demogorgon that was theorized to be controlled by Vecna and got Will from Season 1. Beautiful writing