'Stranger Things': Joseph Quinn on Eddie's Metallica Performance in Season 4 Finale (Exclusive)

Spoilers ahead! Joseph Quinn chats with ET's Will Marfuggi about all things Eddie Munson in the season 4 finale of 'Stranger Things.' The actor reacts to his character's heroic death in the climactic final battle and shares his favorite moments from the season. He also breaks down Eddie's epic guitar performance of Metallica's 'Master of Puppets.' Plus, Joseph opens up about collaborating with the Duffer Brothers. Season 4 of 'Stranger Things' is streaming on Netflix.