Before "The Avengers: Earth's Mightiest Heroes!" assembles on Disney XD on October 20, Iron Man, Thor, Captain America, Hulk and their fellow heroes fight the battle against evil right here on Marvel.com in a series of micro episodes debuting September 22! You can come back every day through October 11 for an all-new episode, as well as video interviews, character art and more on Marvel.com from now until the highly anticipated hour-long series premiere of "The Avengers: Earth's Mightiest Heroes!" on Disney XD on October 20!
Every day between now and October 11, you can catch a brand-new Micro-Episode of "The Avengers: Earth's Mightiest Heroes!" Watch Micro-Episode 4, "HYDRA Lives!," for free right now!
Iron Man may have finally met his match as the villainous organization known as HYDRA unleashes the Dreadnoughts against him, mechanized war machines built from technology that Tony Stark himself created!
Check back tomorrow for "The Avengers: Earth's Mightiest Heroes!" Micro-Episode 5!
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