High Quality Content by WIKIPEDIA articles! Swamp Thing was an American animated television series based on the DC Comics (later Vertigo Comics) character Swamp Thing. The series was short-lived, with the pilot episode airing on October 31, 1990 followed by four additional episodes airing weekly from April 20 to May 11, 1991. Produced by DiC Entertainment, the series corresponded with Kenner`s Swamp Thing action figure collection released in 1990. Despite the animated series` brief run, various merchandise was also produced in 1991 resulting in the only significant marketing platform ever created for the character.