The Leviathan began as a way to name the terror of the dark, churning sea, and this episode traces the biography of that idea across thousands of years. We start with the Canaanite sea monster Lotan and the Babylonian goddess Tiamat, the chaoskampf pattern in which a creator god must conquer watery chaos, and the Hebrew Bible's deliberate demotion of the beast into something God simply made and plays with in the sea.

From there the story moves through Talmudic legends of a 300-mile creature whose salted flesh awaits a messianic banquet, the Zohar's reading of the Leviathan as a symbol of enlightenment, the Christian and Gnostic reframing as dragon, demon of envy, and soul-trapping Ouroboros, and the medieval Hellmouth. Then Thomas Hobbes turns the monster into the all-powerful state in 1651, and modern science borrows the name for an extinc ...