Yes — in Season 1, Will Byers is rescued alive from the Upside Down by Joyce and Chief Hopper after being abducted by a Demogorgon, and a fake “body” planted by the lab is exposed as a cover-up.

What happened

• Will disappears in November 1983 after encountering a Demogorgon and becomes trapped in the Upside Down.

• Authorities briefly “find” a body in the quarry, but Hopper discovers it’s a fake meant to hide the lab’s activities.

How he was found

• Joyce deciphers Will’s communications through lights and wall letters, helping narrow where he is in the Upside Down.

• Joyce and Hopper locate Will ensnared by vines in the Upside Down and resuscitate him, bringing him home alive.

Aftermath in later seasons

• Will retains a lingering connection to the Upside Down and the Mind Flayer, experiencing visions and physical reactions when threats are near.

• Recent discussion of Season 5 highlights Will’s link to Vecna and suggests he can sense or even influence Upside Down entities, expanding his role beyond the initial rescue.