In "The Bathtub," the seventh episode of Stranger Things Season 1, the main characters unite and construct a sensory deprivation tank to help Eleven locate Will in the Upside Down. The episode concludes with Eleven finding a weak Will in Castle Byers, prompting Hopper and Joyce to prepare for a rescue mission through the Hawkins Lab gate.
In "The Bathtub," the seventh episode of Stranger Things Season 1, the main characters unite and construct a sensory deprivation tank to help Eleven locate Will in the Upside Down. The episode concludes with Eleven finding a weak Will in Castle Byers, prompting Hopper and Joyce to prepare for a rescue mission through the Hawkins Lab gate.