Release Date

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The Avengers: Earth's Mightiest Heroes Season 1 released on October 20, 2010.

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Episodes

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S01E01 Aired October 20, 2010

Breakout (1)

After Iron Man stops an A.I.M. arms trade, Hank Pym talks with Mad Thinker to see what he meant when he referred to the villains in the super prisons as soon being free. All four of the prisons then break down and each hero deals with this. Meanwhile, Leonard Samson is exposed to Gamma radiation when the Cube deactivates and is injured by Zzzax. Hulk escapes with Samson and heads to the nearest civilized area. Graviton escapes the Raft and seeks revenge on Nick Fury.

S01E02 Aired October 20, 2010

Breakout (2)

A flashback to 10 years before reveals Graviton's origin. In the present, Iron Man is outnumbered by old enemies at the Vault. To escape and fight Graviton, Tony self-destructs the Vault, but his armor was damaged and he radios a replacement from his Chicago tower. Thor, Hank Pym, and Wasp try to fight Graviton. Later, they are joined by Hulk and Iron Man and with their combined power they defeat Graviton and form the Avengers in order to catch the 74 escaped supervillians that escaped the four prisons.

S01E03 Aired October 24, 2010

Iron Man is Born

A compilation of the micro-series episodes "Iron Man is Born!", "HYDRA Lives!", "Behold, the Mandroids!", and "Nick Fury, Agent of S.H.I.E.L.D

S01E04 Aired October 24, 2010

Thor the Mighty

A compilation of the micro-series episodes "Thor the Mighty", "The Siege of Asgard", "My Brother, My Enemy", and "The Isle of Silence".

S01E05 Aired October 24, 2010

Hulk vs. the World

A compilation of the micro-series episodes "The Coming of the Hulk", "Hulk Versus the World", "This Monster, This Hero", and "Beware the Widow's Bite".

S01E06 Aired October 24, 2010

Meet Captain America

A compilation of the micro-series episodes "Meet Captain America", "The Red Skull Strikes!", "If This Be Doomsday!", and "Lo, There Shall Come a Conqueror".

S01E07 Aired October 24, 2010

The Man in the Ant Hill

A compilation of the micro-series episodes "The Man in the Ant Hill", "Enter the Whirlwind", "The Big House", and "Welcome to Wakanda".

S01E08 Aired October 27, 2010

Some Assembly Required

The Avengers move into a mansion together, but Hulk threatens to kill everyone after he is magically manipulated by the Enchantress

S01E09 Aired November 03, 2010

Living Legend

The Avengers rescue a frozen Captain America, who has been on ice since World War II.

S01E10 Aired November 10, 2010

Everything is Wonderful

Simon Williams becomes a deadly being of ionic energy after being enraged by Tony destroying his company. Meanwhile, Wasp and Thor chase a group of AIM agents to find their secret hideout and run into another villain, MODOK.

S01E11 Aired November 17, 2010

Panther's Quest

T'Challa, the new Black Panther, meets the Avengers and tells them that his country has been overthrown by Man-Ape. As the Avengers arrive in Wakanda, not only do they have to help T'Challa reclaim his family's throne and country, but they also have to deal with Klaw and the Grim Reaper.

S01E12 Aired November 26, 2010

Gamma World (1)

Leader has placed a dome around the Cube. It soon expands with anyone who is caught in it turned into a Gamma Monster. Meanwhile, Hawkeye catches up with Black Widow.

S01E13 Aired November 26, 2010

Gamma World (2)

With the Avengers turned into Gamma Monsters, Hawkeye must convince Hulk to help fight Leader.

S01E14 Aired December 05, 2010

Masters of Evil

Supervillains invade Avengers Mansion and attempt to destroy the superheroes

S01E15 Aired December 12, 2010

459

Ant-Man and Wasp attempt to prevent an interstellar war between the Earth and two invading alien empires.

S01E16 Aired December 19, 2010

Widow's Sting

Hawkeye infiltrates Hydra Island to battle the Black Widow

S01E17 Aired January 09, 2011

The Man Who Stole Tomorrow

Kang arrives from the future, claiming he must kill Captain America and conquer the Earth in order to save it from destruction.

S01E18 Aired January 16, 2011

Come the Conqueror

The Avengers fend off Kang's invasion of Earth.

S01E19 Aired January 23, 2011

The Kang Dynasty

The Avengers attack Kang's ship with the help of the last of the Ultrons. They defeat Kang, who tells them the worst is yet to come.

S01E20 Aired May 15, 2011

The Casket of Ancient Winters

The Avengers must stop Malekith the Accursed after he unleashes an everlasting winter on Earth. Once Malekith is defeated Thor learns he has been barred from returning to Asgard.

S01E21 Aired May 22, 2011

Hail, Hydra!

The Black Widow requests the Avengers' help in retrieving the Cosmic Cube before AIM and HYDRA tear the world apart fighting over it.

S01E22 Aired May 29, 2011

Ultron-5

Ant-Man gets tired of unending violence and he wants to find a better way to bring peace to world. After all, this is why he created the robot army, Ultron. But something goes terribly wrong.

S01E23 Aired June 05, 2011

The Ultron Imperative

When the team is devastated after a loss, Iron Man and Ant-Man go destroying all remnants of Ultron. But they do not realize that Ultron has transcended his body, and has taken over the world's technology systems.

S01E24 Aired June 12, 2011

This Hostage Earth

The Masters of Evil go all across the world preparing for an invasion that the Earth has never seen. Unless the Avengers can stop the invasion, the people of Asgard are coming to Earth.

S01E25 Aired June 19, 2011

The Fall of Asgard

The Avengers struggle to survive in the realms of Asgard.

S01E26 Aired June 26, 2011

A Day Unlike Any Other

The Avengers go against Loki, although they are nothing to Loki's power.