After Hopper shoots several police officers and takes their uniforms, Murray completes his job with the assistance of Dustin and Erica, but when Hopper and Joyce arrive at the vault with the keys,Murray didn't have the correct Planck constant and they couldn't open it.But Dustin's girlfriend, Susie, told Planck's constant over the phone.

Billy captures Eleven and calls the monster to end her life.Nancy and her companions use Lucas' fireworks to throw at the monsters, while Eleven, who does not have superpowers, uses superpowers to remind Billy of the memories she saw of Billy's mother and who he really is——It worked.Billy protected Eleven from the monster and ultimately sacrificed himself.

Three months later, the Byers family was leaving Hawkins, and Eleven left with them.