NETFLIX has unveiled a first teaser for its upcoming thriller series Below, with Josh Hartnett in the thick of a very wet, very dangerous problem: a sea monster.

The brief first look positions Hartnett as the on-screen anchor for a survival-leaning story that takes its danger offshore, teasing a creature threat that’s less “rough weather” and more “something is actively coming for you.”

Below adds another high-profile TV title to Hartnett’s current run of screen work, and it’s also a clear signal of Netflix’s ongoing appetite for genre series with a big hook and a recognisable face at the centre.

For now, the streamer has only shared the teaser — but it’s enough to set the tone: tense, dark and built around the kind of monster you don’t want to meet when you’re already stuck at sea.

No further plot details, supporting cast or release date information are included here, but the premise is straightforward: Hartnett versus a creature from the deep, with Netflix leaning into the thriller label rather than playing it for camp.

If you like your suspense with a side of nautical nightmare fuel, Below looks ready to deliver.