Where To Stream The Avengers Earth's Mightiest Heroes! Season 1 Episode 21
Hail, Hydra!
- Aired May 22, 2011
- 30 Min
- Rated 9.3
- Number 14 Of 52 Rated Episodes
The Black Widow requests the Avengers' help in retrieving the Cosmic Cube before AIM and HYDRA tear the world apart fighting over it.