The Avengers: Earth's Mightiest Heroes: Season 1, Episode 21

Hail Hydra!

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

Writing:
  • Jack Kirby
  • Stan Lee
  • Jeff Johnson

Stars:
Release Date: 2010-10-20
Seasons: 1 2
Metacritic: 8.4/10
TMDb: 8.2/10
  • Country: US
  • Language: English
  • Runtime: 22

Other episodes for this season

Breakout (1)
Episode 1 - Breakout (1)
Breakout (2)
Episode 2 - Breakout (2)
Iron Man Is Born
Episode 3 - Iron Man Is Born
Thor the Mighty
Episode 4 - Thor the Mighty
Hulk Versus the World
Episode 5 - Hulk Versus the World
Meet Captain America
Episode 6 - Meet Captain America
The Man in the Ant Hill
Episode 7 - The Man in the Ant Hill
Some Assembly Required
Episode 8 - Some Assembly Required
Living Legend
Episode 9 - Living Legend
Everything Is Wonderful
Episode 10 - Everything Is Wonderful
Panther's Quest
Episode 11 - Panther's Quest
Gamma World (1)
Episode 12 - Gamma World (1)
Gamma World (2)
Episode 13 - Gamma World (2)
Masters of Evil
Episode 14 - Masters of Evil
459
Episode 15 - 459
Widow's Sting
Episode 16 - Widow's Sting
The Man Who Stole Tomorrow
Episode 17 - The Man Who Stole Tomorro...
Come the Conqueror
Episode 18 - Come the Conqueror
The Kang Dynasty
Episode 19 - The Kang Dynasty
The Casket of Ancient Winters
Episode 20 - The Casket of Ancient Win...
Hail Hydra!
Episode 21 - Hail Hydra!
Ultron-5
Episode 22 - Ultron-5
The Ultron Imperative
Episode 23 - The Ultron Imperative
This Hostage Earth
Episode 24 - This Hostage Earth
The Fall of Asgard
Episode 25 - The Fall of Asgard
A Day Unlike Any Other
Episode 26 - A Day Unlike Any Other