1 8 0After 74 villains break out of prison, Marvel’s most powerful superheroes team up to capture all of them, and also to defend the Earth from widespread threats. Download: Earth’s Mightiest Heroes Season 1 Summary 8.0 great Earths Mightiest Heroes (2010-2012) 0After 74 villains break out of prison, Marvel’s most powerful superheroes team up to capture all of them, and also to defend the Earth from widespread threats. Download: Earth’s Mightiest Heroes Season 1 Pages: 1 2 Streaming and download link will work only for Authorized Users. Read this for more info.