It's a super-team team-up as the Squad helps out the Fantastic Four with an ambush from the alien Skrulls and Super-Skrull. Meanwhile, Dr. Doom is making a devious deal with a mysterious cosmic villain named Thanos. As the battle rages in the Baxter Building and outer space, our heroes find that both threats are connected and they may have to make a deal of their own to save the Earth!

A fractal mishap finally gives M.O.D.O.K. his big chance to overthrow Dr. Doom. But with Loki's manipulations driving his big head even bigger, M.O.D.O.K. becomes an omnipotent threat to other villains and the city itself. Even the Squad (with the Black Panther's help) can't outwit "Mo-Dork". But just maybe Iron Man can inspire Dr. Doom to get his mojo back and team-up against M.O.D.O.K..

After escaping General Ross, the Hulk meets the Gamma Mutant Warriors and hides out at their base. While there, the Abomination kidnaps Banner and takes him to the Leader. Will Betty and Rick be able to save him before the Leader and Gargoyle find the key to his gamma mutation?

Bruce befriends Mitch McCougthen who offers his help to find a cure for the gamma radiation responsible for turning Banner into the Hulk. But when their experiment goes wrong, McCoughten turns into Zzzax, a being of pure energy. Can the Hulk stop him before he destroys a dam?

In this first episode of the series, Bruce Banner attempts to cure himself of the Hulk but his experiment is shut down by General Ross and Major Talbot. They capture the Hulk and take him to the Gamma Base, where Banner recalls his origin. Suddenly, the Abomination arrives on the scene, sent by the Leader and Gargoyle to capture Banner, and it's up to the Hulk to stop him.

Hawkeye has faced his fair share of super villains in the past, but something doesn't sit right about his last encounter with the Incredible Hulk. Why did the Hulk save his team? And what's going on behind the scenes that Clint doesn't know about?

"Helping Hand, Iron Fist": Bruce Banner goes to Los Angeles to ask Tony Stark for help. Wanting to help his friend, Rick Jones follows Banner and finds himself in the middle of an earth-shattering battle between Iron Man and the Hulk. Will Iron Man and War Machine be able to cure Banner before Gabe Jones and his S.H.I.E.L.D. agents take down the Hulk?

Kang the Conqueror, the undisputed ruler of Earth in the 40th Century, has a problem. There is a disturbance in the time stream--his entire reality is being wiped from existence, and the entire disturbance has a single source: Captain America.

It's the final episode! At a Mutant/Human Relations Summit, Henry Peter Gyrich attacks and severely injures Professor Xavier with an energy disruptor. Meanwhile Magneto makes final preparations to take over the world with his mutant army, but on the eve of the invasion Cyclops, Wolverine, and Jean Grey infiltrate Genosha to tell Magneto that Xavier is dying. Magneto halts his plants out of respect to his long-time friend and joins the X-Men as they say farewell to their beloved mentor.

The Hulk may be able to take on tanks, assault choppers, and heavy artillery, but what about two of S.H.I.E.L.D.’s most highly trained agents? Introducing…Hawkeye and the Black Widow!

"Man to Man, Beast to Beast": Bruce Banner travels to Canada to find his old friend, Dr. Walter Lankowski and try to get rid of the Hulk once and for all. But when Bruce finds his friend, a terrible secret is revealed!

In London, England's Victorian era, two scientists, Dr. James Xavier and Dr. Nathaniel Essex, hotly debate Charles Darwin's theory of natural selection. Essex believes mutants are the next genetic step forward and begins a bizarre experiment involving mutant evolution. The origin of Mr. Sinister is revealed, as Dr. Xavier attempts to stop Essex before he goes too far.

The villainous Wrecking Crew is tearing through New York City. The only thing standing in their way? The Mighty Thor!

"Innocent Blood": Ghost Rider comes to town, and he's tracking the Hulk! Simultaneously, Talbot is also looking for the Hulk and uses an infectious blaster on him. Now, the only way to save Banner's life is to make the Hulk madder than he's ever been before!

Professor Xavier receives a call for help from the parents of a new mutant, Sam Guthrie. The X-Men travel down South to visit the new mutant and find that an Army official is planning on using Sam to do his bidding!

"Doomed": Bruce Banner travels to Washington D.C. to see his cousin, Jennifer Walters. The reunion is interrupted when Doctor Doom captures them, planning to use his mind control device on the Hulk. In the process, Jennifer is transfused with Bruce's blood and becomes the She-Hulk!

"Fantastic Fortitude": Banner and She-Hulk go to New York hoping to find Reed Richards and ask for help in finding a cure for the Hulk. However, the Fantastic Four is on vacation, except for the Thing! And when the Ogress and the Leader's Gamma Warriors decide to attack the trio, it's sure to be clobberin' time!

"Mortal Bounds": Gargoyle releases a gamma virus on the citizens of Detroit, and Bruce Banner is the only one who can stop it from spreading. To make matters worse, Betty is infected with an extreme dosage of the virus! Bruce meets Doctor Donald Blake, who transforms into the mighty Thor. Together, they race to find a cure!

The Earth's magnetic fields are being disrupted by the Zodiac gang, whose primary objective is to obtain an ancient meteorite buried beneath an island on Earth. With the Earth's survival at stake, the Avengers have a final showdown with the Zodiac gang!

"And the Wind Cries...Wendigo!": After hearing about the existence of a creature resembling the Hulk, Betty Ross goes out to find it. What she finds is not the Hulk, but the legendary Wendigo!

Something is dangerously affecting the magnetic fields of the Earth. Wasp realizes that her father's old business partner, Cornelius Van Lundt, is behind the disruptions. Along with the Avengers, Wasp must face her past in order to save the Earth.