Carnage is the twelfth episode of season three. Spider-Man must team up with Iron Man and must make an uneasy alliance with Venom to stop Baron Mordo and Carnage from releasing Dormammu from the Dark Dimension. This episode features the first full appearance of Iron Man.

Cletus Kasady, better known as Carnage, is a supporting antagonist in the 1994-1998 superhero television series Spider-Man. Kasady was an infamous criminal before Dormammu recruited him and gave him his symbiote. He was voiced by Scott Cleverdon.

Spider-Man soon arrived and fought Carnage. However, Carnage was able to defeat Spider-Man easily. While Spider-Man was unconscious, Carnage attempted to drain him of his life force but was unable to. Carnage became furious because of this and wondered why he couldn't drain Spider-Man of his life force.

Cletus Kasady, also known as Carnage, is a major antagonist in the 1994-1998 animated superhero television series Spider-Man. He was an infamous criminal before Dormammu recruited and gave him his symbiote. Although the show is family-friendly, the writers still did their best to make their version of Carnage faithful to the comics.

Carnage is about to off Spider-Man when Venom stops him. He wants the webslinger for himself. The two begin fighting when Baron Mordo appears to stop them. Carnage grabs the Interdimensional Probe and the two escape. After bringing the dimensional technology to Mordo, Venom and Carnage restart their fight.

Peter Parker, also known as Spider-Carnage and formerly known as Spider-Man, is an alternate universe counterpart to Spider-Man. He is the combination of one version of Spider-Man and the Carnage...

When Baron Mordo offered Brock the chance to become Venom again, Carnage told Mordo he also wanted in. Bonding with an offspring of Venom's symbiote, Kassady was reborn as Carnage. Carnage later attempted to bring Dormammu into his dimension, but was instead trapped in an alternate dimension along with Venom.

Carnage is about to off Spider-Man when Venom stops him because he wants the webslinger for himself. The two begin fighting when Baron Mordo appears to stop them. Carnage grabs the interdimensional probe and the two escape. As the guards chase after the two symbiotes J. Jonah Jameson arrives and is about to unmask Spider-Man. Tony Stark suits up.

While attempting to stop The Kingpin with the real Peter Parker, who temporarily took the name The Scarlet Spider while he and Peter figure out their respective clone status, the carnage symbiote was released and bonded with Peter, creating Spider-Carnage.

The Carnage symbiote is an alien life-form that first appeared in the Spider-Man crossover episodes "Back in The New York Groove" and "Drive My Carnage" episodes of Guardians of the Galaxy: Mission Breakout.