Iron Lung

Iron Lung

HorrorSci-Fi

Release Date: 13th March, 2026

Release Platform: In Cinemas

Language: English

Producer: Jeff Guerrero, Will Hyde

Production House(s): Markiplier

Director(s): Mark Fischbach

Duration: 2h 10m

Overview

Iron Lung is an intense science fiction horror film that plunges viewers into a terrifying cosmic nightmare where stars and habitable worlds have vanished. Humanity struggles for survival on crumbling space stations, desperate for resources in a dark, empty void. When an impossible ocean of blood is discovered on a desolate moon, a convict named Simon is welded into the SM-13, a rusting and windowless submarine, and sent into the crimson depths. Because the porthole is encased in iron, Simon relies on a grainy, high-radiation camera to navigate. As he descends, the isolation causes his sanity to crack, revealing that the ocean is a conscious, predatory presence.

Iron Lung is a claustrophobic masterclass in futility. It doesn’t just show us a monster; it forces us to sit in a tiny metal coffin and watch as a man realises that in a universe where the light has gone out, there is no such thing as a safe return.

Cast

Mark Fischbach

Mark Fischbach

Caroline Kaplan

Caroline Kaplan

Troy Baker

Troy Baker

Elsie Lovelock

Elsie Lovelock

Elle LaMont

Elle LaMont

Mick Lauer

Mick Lauer

Dave Pettitt

Dave Pettitt

Holt Boggs

Holt Boggs

Fun Facts

- Markiplier confirmed during production that Iron Lung would contain more fake blood than any horror film ever made, surpassing the 2013 Evil Dead remake's record of 50,000 US gallons. The final count came in at over 80,000 US gallons, more than 300,000 litres, confirmed in a YouTube livestream in December 2025.

- During filming, Markiplier had to go to the hospital after getting too much fake blood in his eyes.  David Szymanski also noted that due to the cold weather during filming, the fake blood became very cold and was particularly unpleasant for Markiplier to be covered in.