Tales of Tomorrow - Season 1 - Episode 15 - Dune Roller
On isolated Lightning Island, a rock mysteriously crashes out of a house after pebbles combine and grow. Scientists discover the rocks consist of an unknown mineral. But long-time resident Cap Zanse believes it's an Ouroboros or hoop snake, a legendary creature which rolls with tail in mouth, and is blamed for the mysterious extermination of local animals on the Lake Michigan isle.