Watch Online: How to Kill a Mermaid: The Linnea Mills Story (2026)

Diving Into Tragedy: How to Kill a Mermaid: The Linnea Mills Story is a haunting true-crime documentary that examines the tragic death of 18-year-old Linnea Mills during a cold-water scuba diving expedition in one of America's most stunning national parks. Through previously unreleased footage and a meticulous investigation into what happened during that fateful 2020 dive in Montana's Glacier National Park, this compelling film pieces together the circumstances surrounding her death while celebrating the vibrant life she lived.

Documentary Overview

Director Damon Ristau crafts an intimate and deeply moving portrait of loss in this 135-minute documentary. Rather than sensationalizing tragedy, the film honors Linnea Mills' memory by exploring the details of her death with care and respect, making it a must-watch for documentary enthusiasts and true-crime fans alike. The inclusion of never-before-seen footage provides viewers with unprecedented access to the investigation and the people who knew her best.

Release Date & Availability

How to Kill a Mermaid: The Linnea Mills Story is set to premiere on February 14, 2026. While specific streaming and theatrical release details are still being finalized, this is your chance to mark your calendar. For the most current information on where to watch online and theater showtimes, check back closer to the release date.

What We Know So Far

• Genre: True-Crime Documentary
• Director: Damon Ristau
• Runtime: 135 minutes
• Country of Origin: United States
• Subject: The 2020 death of Linnea Mills in Glacier National Park, Montana
• Full Cast: To be announced

The Story Behind the Title

At just 18 years old, Linnea Mills was an adventurous spirit who embraced life's experiences—including cold-water scuba diving in one of the nation's most beautiful locations. Her unexpected death sent shockwaves through her community and raised important questions about diving safety and preparation. This documentary doesn't shy away from those difficult questions, instead using them as a framework to understand both the tragedy and the remarkable young woman at its center.

Stay Updated on This Documentary

As we approach the February 2026 release, more details about streaming platforms, theatrical availability, and the full cast will be announced. Bookmark this page now to receive the latest updates on how to watch How to Kill a Mermaid: The Linnea Mills Story online and in theaters. Don't miss this powerful exploration of tragedy, investigation, and remembrance.

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