Swamp Thing

Something unnatural is happening in the swamps outside Marais, Louisiana. When a mysterious illness strikes the town, CDC investigator Abby Arcane is sent to investigate. At the hospital, she encounters biologist Alec Holland who believes the bizarre illness might be connected to his scientific work in the swamp for powerful businessman Avery Sunderland. Along with Deputy Matt Cable, Abby and Alec encounter a terrifying, dark force that’s more than a swamp-born virus. Abby consults her old friend and local reporter Liz Tremayne who has a lead deep in the swamp. When Alec goes missing after investigating the unnatural experiments deep in the swamp, something else rises in his place: Swamp Thing, a mysterious creature born of the depths of the swamp’s mystical and terrifying secrets. With nature wildly out of balance and coming for the people of Marais, in the end, it may take some Thing from the swamp to save it.

While Sheriff Lucilia Cable (series star JENNIFER BEALS) searches for Alec unsuccessfully, Abby theorizes that it was more than an accident and retrieves his video journals from Daniel Cassidy (special guest star IAN ZIERING). When one of her patients, Susie Coyle (guest star ELLE GRAHAM), escapes from the hospital, Abby and Matt follow her into the swamp. There, Abby encounters Swamp Thing - a creature that Susie later identifies as Alec Holland. While Alec struggles to understand his metamorphosis into the monstrous, plant-based creature, known as Swamp Thing, Avery meets with Jason Woodrue (series regular KEVIN DURAND), the scientist who initially developed the biological accelerant responsible for the "green flu" and orders him to halt the epidemic. And Maria Sunderland reaches out to Madame Xanadu (series star JERYL PRESCOTT) in order to communicates with her dead daughter, Shawna (guest star GIVEN SHARP).

Driven to cure the worsening epidemic in Marais, when her friend and co-worker Harlan (recurring guest star LEONARDO NAM) is stricken with the "green flu," Abby searches Alec's lab for a cure, but instead finds the latest supernatural reanimation from the Rot. Although Swamp Thing uses his strange new powers to intervene, he's more desperate than ever to find his humanity. Meanwhile, Avery Sunderland is facing increasing pressure from financial sources and Sheriff Cable who questions him about the death of Alec Holland.

Realizing that his new abilities allow him to communicate with the life around him, Swamp Thing senses a growing darkness within the swamp and begins to understand his role in the struggle for balance between growth and decay. Abby, meanwhile, is forced to accept that the things she has witnessed in Marais are evidence of supernatural forces at play - especially when her return dredges up her dark history with the Sunderlands. And Liz shares some evidence with Sheriff Cable about her investigation into the death of Alec Holland. Lastly, we learn more about the mysterious Daniel Cassidy and the supernatural bargain that keeps him in Marais.

Haunted by the ghost of her childhood friend who reemerges from the swamp, Abby's forced to confront both her past with the Sunderlands as well as the dark forces at play in Marais. While she continues to search for a cure for Alec, he struggles to come to terms with his transformation with the help of a mysterious Phantom Stranger (recurring guest star MACON BLAIR). When Abby's life is threatened, Swamp Thing is able to use his abilities to save her, but it's Matt, ultimately, who saves the day - further isolating Swamp Thing from the human world. Meanwhile, Sheriff Cable learns some disturbing information about her son, while Jason Woodrue shares a revelation about Swamp Thing with Avery Sunderland.

Increasingly alienated from humanity after being hunted by sheriff’s deputies and animal trackers, Swamp Thing struggles to understand his strange condition. Reassuring him that they will find a cure for his condition, Abby and Swamp Thing are discovered by Matt who learns the truth about Alec Holland. Meanwhile, Avery pressures Woodrue to deliver results, which escalates his experiments with Swamp Thing’s genetic materials and leads him to a test on Daniel Cassidy; while Lucilia Cable gets some perspective on her son’s recent actions.

Still taking on the human appearance of Alec Holland, Swamp Thing guides Abby to an area of the swamp blighted with the encroaching Rot. But when her life is threatened, he must use all of his still-developing powers to save her. Meanwhile, Lucilia leads Avery out into the swamp under a pretense, while Maria meets with Nathan Ellery (guest star MICHAEL BEACH), the leader of the shadowy finance group known as the Conclave.

After a harrowing journey of survival through the swamp, Avery comes face to face with Swamp Thing, who rescues the injured man. After recovering, Avery vows to return with Woodrue and help find a cure. But can they be trusted? Meanwhile, Abby is confronted by Nathan Ellery and the Conclave at the CDC in Atlanta. Realizing that Swamp Thing is in danger, she returns to Marais – only to find she’s too late. Lastly, Matt learns a secret about Avery Sunderland.

After being captured and taken to a Conclave facility, Swamp Thing is experimented upon by Jason Woodrue, who makes an incredible discovery. Meanwhile, Abby and Liz track down the secret facility to free Swamp Thing. And Daniel Cassidy makes a fateful decision based on a possible future that the Phantom Stranger shows him.

The swamp fights back in the season finale. Still reeling with the revelation of the truth behind his existence, Swamp Thing goes on the offensive against Ellery’s mercenary team hunting him. Meanwhile, Abby comes up against Jason Woodrue who’s crossed the line to save his wife’s life. And as Liz tries to help Dan Cassidy escape the curse of the Blue Devil and leave Marais once and for all, Avery Sunderland attempts to find a resolution to his relationship with Lucilia and Matt Cable.