"Trick or Treat, Freak" is tenth episode of the second season. As such, it's the ultimate Halloween episode! What do the kids dress up as?
Answer Ghostbusters
The group go trick-or-treating dressed up as the Ghostbusters, and Max ends up joining them. Mike, who was unaware of Dustin and Lucas's initiation is disgusted as he thinks Max doesn't belong with them. Will, on the other hand, has another episode experiencing himself back in the Upside Down.
Asked by Vasilii Kulev · Last updated 5 years ago · 17K views · SOURCE