Wilson Chapman editorAfter sending Kate Bush to the top of the charts, Volume 2 of “Stranger Things 4” brought out another centerpiece needle drop in the form of Metallica’s eight-minue, ’80s metal classic “Master of Puppets.” On Tuesday, the band responded to the use of their song in the show’s finale.In the Season 4 finale “The Piggyback,” the character Eddie Munson (Joseph Quinn) plays “Master of Puppets” — released in 1986, the year in which the season is set — to distract the demonic bats protecting the lair of main villain Vecna (Jamie Campbell Bower). As Variety exclusively reported, series creators the Duffer Brothers wrote the song into the script during pre-production, after which series music supervisor Nora Felder got clearance from the band.