While Raphael takes a turn leading the group, Leonardo ventures elsewhere and meets Karai, a female ninja with dark secrets.
Michelangelo befriends an unstable mutant alligator who possesses a strange piece of Kraang technology, but the other Turtles aren't sure whether "Leatherhead" is a friend or a foe.
The Avengers are vastly outnumbered when they crash land on the Kree home world Hala. Will Earth's mightiest heroes live to fight another day?
Chaos ensues when Donatello creates Metalhead, a robotic turtle to fight alongside the rest of the group.
The Kree Empire established a wormhole that will directly link Earth's solar system to the Kree galaxy, and the Avengers must journey into space to stop them before the Sun and thus all life on Earth are destroyed. Will Kang the Conqueror's prediction finally be proven right?moreless
The Turtles meet a devious inventor named Baxter Stockman. But is this man all that he appears to be?
When Kang traps the Avengers in a temporal void and once again tries to conquer the world, a new team of heroes is assembled to save the day, but do these unlikely allies have what it takes to work cooperatively and fight off an invasion from the 30th century?moreless
Upon being cleared of false charges, the Hulk is released from imprisonment. However, he's not quite himself, and may no longer even be fit to be an Avenger. When the Red Hulk takes the green giant's place on the team, Captain America isn't ready to give up on his old friend so easily, and takes the initiative to investigate Hulk's strange behavior.moreless
When mysterious fumes spread through New York City, causing the Avengers and many citizens to contract a strange disease that mutates them into disfigured, red-skinned creatures, Iron Man, whose suit of armor protects him from the fumes, rushes to develop a cure, while Secretary of Defense Dell Rusk's team "Code Red" tries to quarantine Earth's mightiest heroes.moreless
After a month of repairs, Vision awakens to a world ruled by Tony Stark and the Avengers. When Vision frees a few of the Avengers from what appears to be worldwide mind control and the small group of heroes attempts to save the world from one of their own, it soon comes to light that Tony Stark, who appears to be controlling the entire world, isn't even in control of his own body.moreless
Challenged to a fight by Wendy's boyfriend, Robbie, Dipper is left feeling helpless and hopeless. His apprehension turns to excitement, however, when Rumble McSkirmish, his favorite video arcade fighter, comes to life and agrees to help him defeat Robbie. It looks like Dipper has the upper hand but then things take a turn for the worse.moreless
A mysterious red-skinned Hulk attacks the S.H.I.E.L.D. Helicarrier on the Hulk's "day off." As Captain America and Wasp try to defend the Helicarrier from this new monster, who is believed by Maria Hill to be the Hulk, Hawkeye must guard Bruce Banner, who is reluctant to be protected by "his" own teammate.moreless
An armorless Iron Man fights A.I.M.'s latest creation, the Technovore, while A.I.M. agents go up against Captain America, Black Panther, and War Machine in an effort to steal the armored Avenger's armor.
The Avengers and the Fantastic Four are attacked by the forces of the villainous Dr. Doom, who kidnaps Wasp and Invisible Woman and unleashes an army of Doombots upon New York City. However, there is more to this evil plan than what's on the surface.moreless
Captain Atom is drained of his powers but continues to try serving as a superhero with the Justice League, with an assist from Batman.
To protect all of Batmen's past incarnations, the JLI must travel through time to save the Caped Crusader's selves.
Eight of the nine realms have fallen to the evil forces of Loki, leaving only Earth free of his rule. Now the Avengers unite in Asgard for a final battle with Thor's malicious half-brother, although it's not just Earth that's on the line this time. The fates of nine worlds reside in the hands of Earth's eight mightiest heroes.moreless
Desperate to find the Joes, Flint enlists the help of Zartan. Meanwhile, the Baroness is charged with the delivery of a new prototype that can mimic other peoples' appearances.