Thor returns to find Earth under the rule of Doctor Doom, who has changed the past drastically to ensure that the Avengers never formed.

Iron Man's confidence is shaken after he inadvertently puts Falcon in harm's way. When the Cabal pulls the trigger on its final plan, Tony has to put aside his personal dilemma and be the leader he was born to be.

The Avengers put their lives at risk to protect none other than Doctor Doom.

The Avengers learn what it's like to walk a mile in Hulk's shoes when a Gamma attack by Red Skull turns them into raging monsters - the unlikely duo of Hulk and Black Widow are the last line of defense between the city and the Hulk-Vengers.

The Avengers and the Cabal have a huge confrontation that leaves the team forever changed. Tony also learns that "the stats" can't be trusted every time -- there's no substitute for human intuition.

When Galactus attacks Earth, Iron Man is able to lead him to another planet but discovers that it is populated and under the protection of the Guardians of the Galaxy.

Hyperion arrives to save the Earth but his methods become too extreme and the Avengers must stand up to him.

The Avengers start to see how tough the Cabal is and how much strength they'll need to take it down.

Doctor Doom takes command of the Asgardian Destroyer armor and Thor has to convince the team to trust the one person who may be able to stop him, Loki!

Odin comes to the Avengers Tower demanding his son cease his "fun" on Earth and return to Asgard. Thor promises that if he can't prove the good he does on Earth he'll return home forever.

Iron Man and Captain America disguise themselves as villains to infiltrate Red Skull's Cabal, but when their disagreements over strategy cause their cover to get blown, they're forced to take on the entire Cabal alone.

Tony becomes too reliant on his tech so Cap challenges him to go without it for one full day.

Hulk and Hawkeye suddenly find themselves stuck in a death match at the hands of the intergalactic broadcasting master, Mojo.

When Attuma tries to sink Manhattan, Hulk is forced to prove his strength or perish trying.

When Hulk crash-lands on Earth with amnesia, The Avengers reconstruct a day-in-the-life of Hulk to find out what world-ending threat could have knocked out The Strongest There Is.

While Iron Man and Ant-Man are trying to stabilize particles that can shrink or grow matter, Falcon gives them terrible news -- his mom is coming to visit, and she has no idea he's an Avenger.

The Avengers are out-gunned by the high-tech, power-mimicking Super-Adaptoid, and Captain America is the last man standing against the ultimate artificial intelligence!

Thor believes he must sacrifice himself to save the world from Doctor Doom, who summons the Midgard Serpent using a powerful Asgardian weapon.

To save Black Widow, Captain America leads the team into battle against a former World War II ally who he struggles to convince the team is a real person.

When Captain America is apparently destroyed by Red Skull, Iron Man reunites the team to avenge him.

Red Skull steals Tony Stark's armor and The Avengers put aside their differences and stop him and M.O.D.O.K. from destroying New York City.

The rookie Falcon stands alone to save his team and stop a full scale invasion of Earth after the Avengers fall victim to the body-swapping Space Phantoms.

When the Circus of Crime rolls into town, Hawkeye's dark past begins to surface and puts the Avengers in danger.

Hawkeye and Black Widow take on a covert S.H.I.E.L.D. mission to bring in the son of a super-villain, but when he is revealed to have a world-bending weapon, they realize keeping their mission a secret may be a fatal mistake.

The Avengers' world is turned upside down when the shape-shifting mischief-maker Impossible Man makes Falcon the star of his own action movie, but the blockbuster puts all of Earth on the line.