The song Eddie plays in the “Stranger Things” finale is “Master of Puppets” by Metallica. It first appeared on the 1986 album of the same name, which was deemed important enough to be included in the Library of Congress’ National Recording Registry in 2015.
“Master of Puppets” is heavier than most of the musical fare on “Stranger Things” to date, but not uncharacteristic of Eddie, who boasts a collection of tapes from heavy metal bands of the time. His solo morphs into Metallica’s recording — complete with James Hetfield’s vocals — and lasts just long enough to bring Max to the temporary safety of an upside-down version of the Hawkins Middle School Snow Ball.
While Eddie is later killed by a swarm of bats and Max ends the season in a coma after her clash with Vecna with multiple broken limbs, his heroic actions help save the day. It might not have been a happy ending for both characters linked by Eddie’s “Master of Puppets” solo, but at least viewers got to hear a good chunk of another iconic ’80s song.