There are no featured audience reviews yet. Audience Reviews for Swamp Thing: Season 2. Swamp Thing premiered May 31, 2019, on DC Universe. Fans of the "Swamp Thing" have 25 more reasons to Shout! Based on the DC comic book character, the "Swamp Thing" has returned for the first 25 episodes of the third and final season of this campy … Swamp Thing is the latest show in The CW's extensive library of TV show featuring DC Comics heroes and villains. Click the link below to see what others say about Swamp Thing: Season 2! Swamp Thing: The Complete Series was released digitally December 2… Despite being canceled not long after its premiere, DC Universe continued to release the remaining episodes of the series, with the finale being released on August 2, 2019. 'Swamp Thing' has been cancelled at DC Universe, meaning there's no Season 2 for the sci-fi drama.