Swamp Thing -Alec- Trailer (HD) DC Universe series br Swamp Thing premieres Friday May 31st exclusively on DC Universe. SWAMP THING follows Abby Arcane as she investigates what seems to be a deadly swamp-born virus in a small town in Louisiana but soon discovers that the swamp holds mystical and terrifying secrets. When unexplainable and chilling horrors emerge from the murky marsh, no one is safe.