Will finds a car in the swamp, and attached are two married ghosts and their remains. The search for their killer, who just might be an old acquaintance of theirs, begins with the help of Will and the Swamp Thing.
Dorian is an emotionally troubled teenager. He befriends Will, who begins to discover his troubled home life. Will and the Swamp Thing begin to try to help Dorian but there is one catch: Dorian could also be a vampire.
Still fruitlessly searching for her missing son Jim, Tressa is diverted when she hears the voice of her former boyfriend, a radio jockey from the 70's. Tressa begins a second hunt for answers, as she discovers what really happened when her boyfriend disappeared 18 years ago, guided by his voice from the grave.
Sheriff Andrews allows Dr. Arcane to hunt an employee for sport. To teach Andrews a lesson, the Swamp Thing traps the corrupt sheriff in a fantasy of the Wild West populated by familiar faces, forcing him to duel the evil Renegade Jake in a fight to the death.
When Arcane unleashes a genetic assassin into the swamp in the form of a virus, he gets more than he bargained for; he not only gets rid of the Swamp Thing, but he accidentally brings Alec Holland back.
The ghosts of two temporally displaced Confederate Civil War soldiers appear in the swamp, one of whom is a previous resident of Will's house. The Swamp Thing assists Will to help the man to discover the mystery behind his wartime disappearance and make peace with his past.
Arcane finally resurrects his wife Tatania, only to learn the woman is an impostor. A few hours in the lab with this woman leads Arcane to discover the true whereabouts of his beloved wife and the identity of her captor; General Sunderland.
Arcane's genius mentor, Carl Mirador, has died. Using an experimental brain cell transfer, Arcane transfers all of Mirador's knowledge into his own brain. He also transfers Mirador's mental illnesses. Meanwhile, Will meets, and falls for, Mirador’s granddaughter, Dana.
Arcane's rival, Carla Jeffries (Tyne Daly) takes over his business, putting Arcane in the streets and stealing his "loyal assistant", Graham. The Swamp Thing discovers that she is a much more formidable enemy than Arcane ever was.
Graham leads a team of heavily armed mercenaries into the swamp to kill the Swamp Thing once and for all. Meanwhile, Tressa learns a few of the secrets of the swamp when she has a wounded visitor.
A hunter and his son search the swamp for an endangered hawk. Their relationship is in shreds, and their conflict may prove deadly for Will, who has been adopted by the swamp to help protect the hawk.
Arcane hosts a science conference, but it is crashed by a professional hit man who used to work for Sunderland and now has a score to settle. The Swamp Thing discovers the identity of the hit man and has a score to settle of his own.
A chemical plant causing toxic damage to the swamp is the key to a darker future. The owner of the chemical plant and an obsessed journalist are teleported to the future to see first hand what the damage is causing.
Arcane's experiment to bring out the inner beast in a human being works a little too well. He goes on a rampage and his assistants will suffer the cost as they, along with the Swamp Thing, search the swamp to stop him.
Three convicts escape from prison in search of loot from a heist buried in the swamp. They soon discover they are not only being followed by the cops, but the Swamp Thing as well.
Arcane is convinced that Carter LaRoche is attacking him in the night, but LaRoche is locked up in an insane asylum, and he is getting pretty friendly with Will.
A lunatic escapes from a local asylum and knocks on Tressa's door late at night. He proclaims himself as an alien killer. Even the Swamp Thing is in danger.
Arcane, trapped in a cave with an unconscious Swamp Thing, launches into a monologue that sheds light on his motivations and (deep, enormous) neuroses.
Tressa's long-estranged sister returns looking for shelter from an enemy of her husband and ends up putting the Kipp house in danger, in the midst of a hurricane.
When an elderly woman, named Irma Swanson, who knew and befriended the Swamp Thing, dies, her estranged daughter, Cathy, comes to town for her funeral. The Swamp Thing and the spirit of Irma then show Cathy the past of Irma’s troubled life in order for Cathy to make amends.
A mysterious couple search the swamp for the legendary Fountain of Youth. Arcane learns about the couple's plans and tries to find the Fountain first, as Will is caught in the middle of the couple's debate on whether or not the Fountain even exists.
The justice of the swamp comes in the form of a panther that stalks Arcane's compound. Arcane and his associates will be humbled one way or another, and the Swamp Thing can do nothing about it.
A little boy dreams of being a pirate. When the boy accidentally stumbles on a plot from Arcane, it could cost him and his mother their lives. The Swamp Thing and Will help the boy's dream come true.
The Swamp Thing gets addicted to hallucinogenic iguana eggs which makes him live out a fantasy of being human again. His addictions almost cost Will his life when Arcane gets involved.
One of Arcane's mentors, Oliver Duncan, has died, taking his secret research with him. Arcane is determined to get at what is left of his research by seducing Oliver's daughter Louise, but she has plans of her own.
A film crew comes to the swamp for a TV movie about Arcane. Things quickly go awry when the lead actor is murdered and mysterious script pages appear detailing the truth about Alec's transformation and Arcane's crimes.
