Part five of season three starts off in cracking form with Steve, Robin, Dustin and Erica unwittingly taking the express mall elevator to Russian HQ, deep below the surface of Hawkins, and with Joyce and Hopper finding trouble in the basement of an old farmhouse - trouble in the shape of a big Russian with a machine gun! The kids in the elevator escape to explore a network of tunnels, and Joyce and Hopper take a hostage, Alexei, from whom they hope to get some answers.
With just the right blend of excitement and humour, this is another excellent episode (after the wonderful fourth episode), one that sees the characters in more then a little genuine peril. The kids in the subterranean Russian lair are pursued by evil Russians, with Dustin and Erica escaping, but Steve and Robin being taken captive, and Nancy and Jonathan come face-to-face with a globulous monster in the Hawkins Memorial Hospital.
All in all, a very satisfying episode that bodes well for the remaining chapters.
7.5/10, rounded up to 8 for IMDb.