The party argues Dart is from the Upside Down, then he escapes
Will says he saw something like Dart last year; Dustin's True Sight theory and Death Star defense end when the trap opens and Dart bolts.
Tag
#true sight
2 moments.
Party members only: the boys plan to find Dart
Mike shuts the new girl out of the AV room; the party debates whether Will's shadow can hurt him and decides Dart is the key.