Stranger Things 5: Mysterious audio clip from show sparks theories ahead of teaser launch at Netflix’s TUDUM event

A cryptic audio-visual clip linked to Stranger Things Season Five has gone viral just ahead of the official teaser’s release at Netflix’s TUDUM event, stirring speculation and theories among fans.

The 30-second clip was shared on X (formerly Twitter) on May 30, with the caption: “THIS IS A CODE RED #TUDUM #StrangerThings5.” It features a grainy audio track layered with disturbing noises including loud bangs, radio static, and garbled voices. A notification in the video attempts to transcribe the audio but ultimately reads: “Can't transcribe message.”

Listen to the audio here:

Fan reactions to the audio

The ambiguous nature of the clip has left fans puzzled, with many questioning whether it is an intentional teaser from the show’s creators. Some believe it could hint at major plot points from the upcoming season.

"I don't know, I'm so confused what it could be," one fan posted. Another wrote, "Maybe it could be at the military base, the monsters are breaking thru the plates that are sealing the rift."

A third fan speculated it might relate to one of the show’s earliest plotlines, suggesting, “So, we're probably getting a season 1 recap, but from Will's POV?”

The viral moment comes as anticipation builds for the fifth and final season of the hit sci-fi series. Netflix has yet to comment on whether the clip is an official preview or a fan-made creation, but the timing has fuelled rumours that the teaser might drop more than just a few nostalgic callbacks.

As fans wait for official confirmation, one thing is clear: the Upside Down is already stirring.