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The Avengers: Earth's Mightiest Heroes Season 1 Episode 21 Hail Hydra! 2010

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Black Widow turns to the Avengers for help when Hydra and AIM battle over control of the Cosmic Cube.

Released: 2011-05-22
Runtime: 22 minutes
Genre: Action & Adventure, Animation, Sci-Fi & Fantasy, Family
Stars: Eric Loomis, Brian Bloom, Rick D. Wasserman, Colleen O'Shaughnessey, Chris Cox
Director: Jeff Johnson, David G. Derrick Jr., Tristin Cole, Leanne Moreau, Dan Buckley

1. Breakout (1) 2010-10-20

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2. Breakout (2) 2010-10-20

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3. Iron Man Is Born 2010-10-24

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4. Thor the Mighty 2010-10-24

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5. Hulk Versus the World 2010-10-24

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6. Meet Captain America 2010-10-24

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7. The Man in the Ant Hill 2010-10-24

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8. Some Assembly Required 2010-10-27

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9. Living Legend 2010-11-03

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10. Everything Is Wonderful 2010-11-10

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11. Panther's Quest 2010-11-17

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12. Gamma World (1) 2010-11-26

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13. Gamma World (2) 2010-11-26

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14. Masters of Evil 2010-12-05

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15. 459 2010-12-12

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16. Widow's Sting 2010-12-19

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17. The Man Who Stole Tomorrow 2011-01-09

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18. Come the Conqueror 2011-01-16

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19. The Kang Dynasty 2011-01-23

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20. The Casket of Ancient Winters 2011-05-15

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21. Hail Hydra! 2011-05-22

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22. Ultron-5 2011-05-29

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23. The Ultron Imperative 2011-06-05

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24. This Hostage Earth 2011-06-12

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25. The Fall of Asgard 2011-06-19

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26. A Day Unlike Any Other 2011-06-26

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