Mysterious Sea Creature Thriller 'Below' Teaser Feat. Netflix has revealed the first look teaser trailer for a new supernatural thriller series titled Below, about a mysterious sea creature hiding underwater. When a mysterious sea creature terrorizes a remote town, a fisherman must fight to protect his family, his community, and his way of life. When an unidentified sea creature begins terrorizing his hometown, Calvin must fight to hold his close-knit community together. Netflix debuts the thriller series Below streaming on Netflix starting October 8th, 2026. Who's intrigued?