Eleven attempts to close the gate she once opened. Joyce gives a last ditch attempt at saving her son.
The group are able to flee the Department of Energy. Only one of them won't make it.
Eleven tracks down her long lost sister, for better or worse.
Will's connection to the shadow monster is tearing him apart, but no one can help. Dustin and Steve prepare to battle Dart.
Jonathan and Nancy get in touch with Murray Bauman. Hooper's lost underneath Hawkins, as Joyce and Will try to save him.
Will's brought more back from the Upside Down. Little Dart is growing into something terrifying.
Dustin finds a weird new pet. Joyce inadvertently finds more evidence Will's still connected to the Upside Down.