Where to stream

Underground

20261h 32mMovieMysteryHorror

Seung-hyeon, a construction team leader with PTSD, is ordered to inspect Dohak Station, where a fatal accident halted work years ago. Inside the eerie, abandoned tunnels, he and Joo-young encounter two mysterious workers and become lost…

DirectorChoi Woo-sik

Where to watch

Expected on OTT

around October 1, 2026

Released in cinemas on August 13, 2026. A prediction based on the typical 6–8 week theatrical-to-streaming window — not a confirmed date. Get the WhichOTT app to be notified the moment it lands.

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Cast · Directed by Choi Woo-sik

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Underground — streaming FAQ

Which OTT platform streams Underground?

Underground isn't streaming anywhere in United States yet.

Is Underground on Netflix?

No, Underground is not on Netflix in United States as of August 2026.

Is Underground on Amazon Prime Video?

No, Underground isn't on Amazon Prime Video in United States right now.

Where can I watch Underground for free?

Underground isn't streaming in United States yet, so there's no way to watch it free at the moment.

What is the OTT release date for Underground?

Underground hasn't started streaming in United States yet. Based on the typical 6–8 week theatrical-to-streaming window, we estimate it will arrive around October 1, 2026. This is a prediction, not a confirmed date.