![](https://images.plex.tv/photo?size=large-1920&scale=1&url=https%3A%2F%2Fimage.tmdb.org%2Ft%2Fp%2Foriginal%2F6K61WKNcDZHaUN16xDVQcKDBRZo.jpg)
![](https://images.plex.tv/photo?size=large-1920&scale=1&url=https%3A%2F%2Fimage.tmdb.org%2Ft%2Fp%2Foriginal%2F4M5evqqCws4n6CLJRXpmNinsnDK.jpg)
The Twilight Zone
The Thirty-Fathom Grave
TV-14
S4 • E2 Jan 9, 1963 53m7.2
As a U.S. Navy destroyer cruises near Guadalcanal in the South Pacific, its sonar detects muted but constant hammering on metal undersea. The eerie sounds emanate from a submarine on the ocean floor, apparently there since World War II. The ship's chief boatswain's mate becomes very nervous, having served aboard that sub - and he was its sole survivor.