Upon Thor's return, he finds that Dr. Doom has gone back in time to prevent the Avengers from being formed to take over the world.
Hulk is suffering amnesia and the team take him through a day in his life to jog his memory.
An amnesic Korra is taken to a temple by the Fire Sages on the island she has washed up on. There, the Shaman realizes that Korra is in danger of losing the Avatar Spirit forever. The sages lower her into a pool of healing water where Korra immediately begins to have visions of past Avatars, who tell her she needs to find Raava and restore the Avatar spirit. Korra then sees a vision of Wan, a man who shows her how he became the first Avatar. In the distance past Wan was granted the power of Firebending by a Lion turtle, but was banished from his village when he used it inappropriately. Wandering the spirit wilds, he learns how to control fire and live with spirits, but soon makes a fatal error that will affect the future of everyone.moreless
When Impossible Man shows up and wants Falcon as his movie star, the team discover that he actually needs their protection.
A world wide snowstorm causes the Hulk team to investigate leading to the discovery of Thor frozen in ice. After breaking him loose, they team up to vanquish the ice giant from earth.moreless
Black Widow is assigned by Nick Fury to find a contingency plan to take down the Hulk after learning AIM has created a gamma virus. Which Hulk and Widow are going to need when Red Skull uses it on the other Avengers.moreless
Dr. Doom has returned, combined with the Destroyer's capabilities and the team must enlist an unlikely allie.
Hulk proves to the team what his limits really are, when the Atlantian Warlord Attuma plans to sink Manhattan into the ocean.
Spider-Man, Iron Man, Thor and Hulk stand powerless after being struck by Dr. Doofenshmirtz's power-draining "inator." Once the Marvel Super Villains - Red Skull, Whiplash, Venom and M.O.D.O.K. - find out that Dr. Doofenshmirtz is responsible for robbing the superheroes of their powers, they seek him out and together create mayhem in Danville. Meanwhile, Phineas and Ferb do everything they can to restore the superheros' powers before the evil villains take over the world.moreless
Hawkeye and Black Widow go on a covert S.H.I.E.L.D. mission without informing the rest of the Avengers, but ultimately regret leaving their teammates in the dark when they discover that their target possesses a weapon of world-bending powers.moreless
A heroic superhuman named Hyperion arrives on the scene to protect and defend the Earth, but turns out to be more antagonistic for the Avengers when his methods prove dictator-like.
The Avengers face a superior technological, power-replicating machine that can turn the Avengers abilities against them and only Captain America's dependency on non-technology can save the day.
When Dr. Doom sends an Asgardian weapon equiped Midgard Serpent to destroy the earth, Thor decides to sacrifice himself.
Novice Avenger Falcon must save his teammates from the body-swapping Space Phantoms.
After having been disbanded for years, the Avengers reunite when Red Skull, having formed an unlikely alliance with M.O.D.O.K., kills Captain America, and the heroes must avenge their fallen comrade and foil whatever plan the Skull is concocting.moreless
M.O.D.O.K. uses his technology to mind control the Avengers, causing them to brutally attack each other, as Red Skull infiltrates the Mansion to carry out a devious plot that puts the entire city of Manhattan at risk.moreless
The Squaddies face the Dark Surfer in a series of one-on-one confrontations with the fate of reality hanging in the balance.
With Earth on the verge of freezing solid, the Squaddies, with new knowledge provided by Ms. Marvel, look to set forth and take on Dark Surfer and stop his destruction of the universe.moreless
The squaddies enlist the aid of Captain Marvel in their quest to stop the Dark Surfer from destroying the universe.
When several of the squaddies are transformed into toddlers, the remaining heroes must find a way to restore their partners' ages before it's too late.
The Squad members have an unexpected visitor in the mischievous alien prankster Impossible Man. They convince him to try and defeat the Dark Surfer as a way to save his marriage.
Mr. Fantastic and Ms. Marvel attempt to rescue the Super Hero Squad from inter-dimensional exile while HYDRA surrounds their Antarctic outpost.
Hulk winds up on a desert planet populated by insectoid people and winds up imprisoned and destined to fight as a gladiator. The Squadies back on Earth struggle to keep the planet from freezing as it moves further from the sun.moreless