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"The multiverse has a way of aligning fates...It's written in the stars and in this book, or I wouldn't know that on this Earth, Clark Kent is Superman. Where I come from, that would be ridiculous. He can't see past his glasses."

Lex Luthor[src]

This article is about the character set in the Swamp Thing universe. This article only contains information relevant to the Arrowverse. For information regarding that universe, please see Swamp Thing.

An unnamed entity is a resident of Earth-19.


At some point after the Anti-Monitor Crisis and the recreation of the multiverse, the entity was standing in a swamp.[1]


DC's Legends of Tomorrow

Season 5

Behind the scenes

  • Swamp Thing's appearance uses archive footage from Swamp Thing's tenth episode "Loose Ends", which aired a month prior to "Crisis on Infinite Earths: Part Five".
  • In the DC comics, Swamp Thing is an elemental creature who shares a connection to all plant life on the planet Earth through a network called the Green. He is a mass of vegetable matter that absorbed the memories and personality of Alec Holland, a botanist who died in a swamp shortly after creating a hormonal bio-restorative formula for plants.