Video SourcesReport Error
The Avengers: Earth’s Mightiest Heroes: Season1 | Episode21
Hail Hydra!
Black Widow turns to the Avengers for help when Hydra and AIM battle over control of the Cosmic Cube.
S1 - E1Breakout (1) Oct. 20, 2010
S1 - E2Breakout (2) Oct. 20, 2010
S1 - E3Iron Man Is Born Oct. 24, 2010
S1 - E4Thor the Mighty Oct. 24, 2010
S1 - E5Hulk Versus the World Oct. 24, 2010
S1 - E6Meet Captain America Oct. 24, 2010
S1 - E7The Man in the Ant Hill Oct. 24, 2010
S1 - E8Some Assembly Required Oct. 27, 2010
S1 - E9Living Legend Nov. 03, 2010
S1 - E10Everything Is Wonderful Nov. 10, 2010
S1 - E11Panther's Quest Nov. 17, 2010
S1 - E12Gamma World (1) Nov. 26, 2010
S1 - E13Gamma World (2) Nov. 26, 2010
S1 - E14Masters of Evil Dec. 05, 2010
S1 - E15459 Dec. 12, 2010
S1 - E16Widow's Sting Dec. 19, 2010
S1 - E17The Man Who Stole Tomorrow Jan. 09, 2011
S1 - E18Come the Conqueror Jan. 16, 2011
S1 - E19The Kang Dynasty Jan. 23, 2011
S1 - E20The Casket of Ancient Winters May. 15, 2011
S1 - E21Hail Hydra! May. 22, 2011
S1 - E22Ultron-5 May. 29, 2011
S1 - E23The Ultron Imperative Jun. 05, 2011
S1 - E24This Hostage Earth Jun. 12, 2011
S1 - E25The Fall of Asgard Jun. 19, 2011
S1 - E26A Day Unlike Any Other Jun. 26, 2011