When an attempt on Dr. Alec Holland's life leaves him consumed by deadly chemicals and fire, the swamps of Louisiana transform him into a superhuman creature hell-bent on ridding the swamp--and the world--of the evil that men do.
A young boy, Jim Kipp, stays with his grandmother near the swamps and meets a strange muck-encrusted mockery of a man. Meanwhile, Anton Arcane introduces his date to his twisted genetic experiments.
Arcane attempts to get the bio-restorative formula from Swamp Thing by using plastic surgery to turn an accomplice into the living image of Swamp Thing's dead wife Linda.
Arcane has his men kidnap Jim as leverage to keep Swamp Thing from interfering in his newest experiment. However, when one of Arcane's new creatures kills him, Swamp Thing faces a difficult decision.
Jim and Obo sneak into the swamp to spot the Swamp Maiden, a legendary seductress who only appears once every three years.
Arcane calls in a voudon priest to capture Swamp Thing for him.
Tressa's life is jeopardized when she becomes a carrier of an experimental virus that inspires blind hatred in those exposed to it.
Swamp Thing succumbs to toxic waste and is sold to a freak show where Arcane dumps his failed human experiments.
Jim wanders into the swamp, where he is bitten by a mutant fly and becomes gravely ill. Meanwhile, Tressa tries to capture the fly since it's Jim's only chance for a cure... unless Swamp Thing uses his powers.
A dying man comes to the Kipp house, tells Jim that he's his uncle, and informs the boy where a suitcase of money he stole is hidden.
Looking for friends, Jim befriends a young girl who may be more than she seems.
A mysterious visitor to the swamp seems intent on killing Arcane.
Jim and Tressa learn that they must vacate the Langford property.
Dr. Arcane is mass-producing mutants, and Jim is on to him---until Arcane kidnaps him to get him out of the way. Jim's half-brother Will comes looking for him and finds out about Swamp Thing.
A mysterious woman, Abigail, stumbles into Will's life... and has ties to Arcane. Meanwhile, Swamp Thing tries to save the life of a baby.
Swamp Thing is accused of murdering the town's district attorney.
Tressa's friends are trapped in an invisible stealth shield created by Dr. Arcane.
Arcane swaps minds with Swamp Thing so he can discover the secret of bio-restoration, but if they don't switch back in 24 hours it becomes permanent.
On Sutherland's orders, Arcane creates two cyborgs and sends them into the swamp to find and kill any surviving Woodrue experiments... including Abigail.
A rare swamp flower is all that can stop Arcane from destroying food supplies. Meanwhile, Will's father pays a visit but has an ulterior motive.
Trying to perfect a serum to resurrect the dead, Arcane inadvertently infects a man with a death touch.
Arcane develops an earthquake machine that traps Swamp Thing with the machine and Tressa at her dock. However, the engineer who designed the machine has a secret agenda.
Dax, whose brother was killed by Arcane, poses as Tressa's blind date and targets Arcane
Arcane runs afoul of a voodoo curse, and only a houngan and Swamp Thing can break it before it's too late.
A newcomer to the swamp insists that her psychic abilities will benefit Alec
Anton and Swamp Thing join forces against a poisonous mist that threatens to wipe out the entire town.
Swamp Thing helps Will confront repressed memories.
A wealthy Houma native who shows concern for the swamp is really in cahoots with Arcane
Will is entranced by a visiting carnival and a girl traveling with it.
Arcane hovers between life and death after a lab mishap.
A filmmaker seeks to revive his career at Swamp Thing's expense.
The music of an infamous rock musician may have driven two teens to suicide.
Treasure hunters' search for an artifact leads them into the swamp, where Mayan guardians protect the urn in an temple.
Dr. Fisk returns to Houma seeking Swamp Thing, only to be kidnapped by two brothers who think she is Dr. Arcane's girlfriend.
A couple returns as ghosts on the 10-year anniversary of their deaths, and Will and Swamp Thing help them find their killers so that they can move on.
Will befriends a teenager who claims that he's a vampire... and may have killed his mother's boyfriend.
Tressa is haunted by the voice of her first love, DJ Rick Swanson, who disappeared without a trace.
Andrews is forced to let Arcane continue hunting one of his employees, and Swamp Thing confronts the crooked sheriff with a vision of justice.
A mysterious tormentor, Mephisto, appears to sever Swamp Thing's bond to the swamp and challenge his fears of living forever as a mock-encrusted mockery.
When Arcane's newest experiment targets Swamp Thing's genetic structure and threatens to kill him, Ann comes up with a way to revert Swamp Thing to his human form... but the cure is temporary.
The swamp transports two Civil War soldiers to the present day, and one of them discovers that he apparently died a coward's death before he could see his newborn son.
Anton finally brings Tatania back to life, only to discover that she's actually a stripper named Kitty and that Sunderland long ago switched women to keep Anton under his control.
Anton tries to download the intellect of his dead mentor into his own mind, only to discover that the man had schizophrenia.
Scientist Carla Jeffries defeats Anton and prepares to clear-cut the swamp... and Swamp Thing must join forces with his nemesis to stop her.
When Anton depowers the swamp and sends mercenaries to hunt down Swamp Thing, Swamp Thing is forced to undergo Ann's transformation process to lose them... and Tressa finds him.
A wealthy hunter takes his son into the swamp to teach him a lesson. Meanwhile, the swamp reaches out to Will so that he can help find a rare wounded hawk.
Arcane holds his first science conference, but it's a ploy to steal data from his rivals. Meanwhilem Swamp Thing identifies a murderer after envisioning bits of the victim's memory---and his own.
A Congressman wants to use Tressa's tour of the swamp as a cover for his plans to vote "no" on an environmental bill, but an activist from Tressa's past intends to stop him by showing him the future.
An explosion turns Arcane into a half-man, half-beast, and Graham must take charge of the lab.
Escaped convicts trek through the swamp to find their hidden loot, but turn on one another as Swamp Thing confronts them one by one.
Arcane's vacation is disrupted by a perpetrator he thought was in a mental institution.
Will reluctantly escorts two spoiled teenage girls who confide their intent to use an incantation to get three wishes.
Swamp Thing is run over by a man who claims he's pursuing aliens, but Will and Tressa learn that s an escapee from a mental institution.
Trapped in a deadly cave-in with Swamp Thing, Arcane reflects upon his life.
Arcane's persuaded to help Ian James search the swamp for the remains of a plane wreck containing Egyptian artifacts.
Shortly after being told not to date a woman, Will is accused of murdering her father
A visit from Tressa's estranged sister coincides with the approach of a hurricane, which Will fears may harm Swamp Thing.
A female reporter comes to interview Anton, but has an ulterior motive when she finagles her way into Arcane's trust---the destruction of Arcane and his lab.
A woman arrives to attend the funeral of her estranged mother, and gains insight into their relationship when Swamp Thing lets her see her mother's teenage years.
A woman who claims she and Will were married in a past life is arrested for a murder that appears to be the result of a witch's ritual.
Swamp Thing is dismembered while trying to defend Arcane, who is marked for death by spirits bent on destroying him.
An experiment transforms Arcane into a good person, and produces a sound that drives Swamp Thing crazy.
Arcane is out for Swamp Thing's blood when he learns it holds the cure for a rare disease.
A couple searches for the Fountain of Youth, but Anton has his own plans for obtaining it.
Arcane creates a biosphere filled with predacious plants, but his experiment goes awry.
The arrival of a mysterious killer leads to Tressa's abduction and a confrontation with a madman.
Arcane may be a panther's next victim because the results of his involvement in a plot are now destroying the swamp.
Swamp Thing transforms a boy into a swashbuckling pirate to stop Anton from "purifying" the swamp.
Will is drawn to a seductive woman, unaware she is the legendary Medusa.
Arcane creates fake emeralds and attracts the attention of a model as well as hitmen.
Swamp Thing finds a substance that lets him experience his former life through dream states.
Arcane tries to acquire a former employer's cold-fusion formula, but the man dies and Arcane must deal with the dead man's step-daughter, Louise.
Arcane decides to produce a movie about his life, but the actor portraying him is murdered, and his script is anonymously rewritten during production.
Complete episode guide for Swamp Thing with detailed information about every season and episode including air dates, summaries, ratings, and streaming availability in United States.
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