Below: Josh Hartnett Faces a Sea Monster in Netflix’s Creepiest New Thriller

There’s something lurking beneath the waves off the coast of Newfoundland, and Netflix’s new limited series “Below” wants you to feel every bit of that dread. Starring Josh Hartnett, Mackenzie Davis, and Charlie Heaton, this six-part creature thriller blends small-town mystery with genuine horror, and the first-look images already promise something special.

The series follows Calvin Penney (Hartnett), a stubborn but big-hearted fisherman still haunted by his father’s mysterious death decades earlier. When an unidentified sea creature begins terrorizing his hometown, Calvin has to hold his tight-knit community together while protecting his son Wade (Heaton). Teaming up with a visiting marine researcher played by Mackenzie Davis, he sets out to confront the creature and uncover secrets the island has buried for years.

Below: Overview

Filmed on location in Newfoundland and Labrador between July and October 2025, the series leans heavily into its setting — a place creator Jesse McKeown describes as both rugged and isolating, yet full of warmth and eccentric character. That contrast is central to the show’s identity, blending classic monster-movie thrills with genuine small-town heart.

For Hartnett, the appeal goes beyond the creature at the center of the story. He described the project as tapping into a very relatable modern feeling — the sense that larger forces controlling our lives often feel impossible to push back against. Watching a group of ordinary people band together to fight something enormous, he says, offers a satisfying kind of wish fulfillment.

The cast also includes familiar faces from other genre favorites, including Ruby Stokes (“Lockwood & Co.,” “Bridgerton”) and Rohan Campbell (“Halloween Ends”), rounding out a strong ensemble supporting the central trio. Directing duties are split between Jamie Childs, Stephen Dunn, and Helen Shaver, giving each episode a distinct visual voice within the larger story.

Creature features rooted in maritime folklore tap into a long tradition of sea monster mythology, where isolation and the unknown depths of the ocean become just as terrifying as the monster itself.

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With a chilling premise, a talented cast, and a creator who clearly understands the terrain, “Below” looks primed to be one of Netflix’s standout thrillers heading into the fall season.

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