Official Trailer
Rating: 7.4/10 | Genre: Horror, Mystery, Science Fiction | Runtime: 125 min
Starring: Mark Fischbach, Caroline Kaplan, Troy Baker, Elsie Lovelock, Elle LaMont
Iron Lung is a weird movie and I mean that as a compliment. It takes a simple premise and stretches it into something genuinely unsettling over two hours. You’ve got a convict stuffed inside a submarine made of scrap metal, descending into an ocean of blood on some dead moon called AT-5. That’s it. That’s the whole thing. And somehow it works.
Mark Fischbach plays the convict, and he’s stuck in this iron lung submarine the entire runtime. The viewport is welded shut so he can’t see anything. He’s navigating by sonar and a single radio connection to the people above who sent him down. It’s claustrophobic as hell. The camera mostly stays inside that cramped metal box with him, and I found myself getting anxious just watching it.
The pacing is patient in a way that feels intentional. There’s no big action setpiece in the first twenty minutes. The movie lets you sit with the dread. You’re listening to the submarine creak. You’re hearing the blood ocean scrape against the hull. Then stuff starts happening and you realize the filmmakers were building tension the whole time.
Caroline Kaplan is the voice on the radio. You never see her face but her performance anchors the whole movie. She’s professional but there’s this undertone of fear bleeding through. Troy Baker shows up as a scientist or administrator or something, and he’s clearly got his own agenda about what’s happening on AT-5. The dialogue between Kaplan and Fischbach drives the mystery forward.
The ocean of blood thing could have been silly. It could have been a concept that falls apart if you think about it too hard. But the movie treats it seriously. There’s science fiction logic to why it exists and the production design sells you on it. When Fischbach’s character finally sees what’s in that ocean through a tiny viewport, it’s genuinely disturbing.
My only real issue is the last act gets a little convoluted with reveals about what the Consolidation of Iron actually wants and why they keep sending people down. There’s a mystery being solved but some of the explanations feel rushed compared to how patient the first hour was. It doesn’t ruin anything but it does feel like the movie is trying to answer too many questions at once.
The runtime works though. At two hours and five minutes it could have felt long but I was invested enough that it didn’t drag. The sound design deserves special mention because you’re basically stuck listening to a submarine for the whole movie and the sound team made that interesting.
If you go in expecting space horror with jump scares and action, you’re going to be disappointed. Iron Lung is more about atmosphere and isolation and slowly piecing together what’s really going on. It’s the kind of movie that gets under your skin because of what you imagine rather than what you see. Have you seen any other films that did the whole “trapped in a small space” thing well?
Where to Watch
Streaming availability varies by region. Check your favorite streaming platform to see if this title is available in your country.