Thor is summoned back to Asgard to prepare for his father Odin's sleep. Instead of remaining, he goes against his father's wishes and decides to return to Midgard (Earth), but before he leaves, he must protect Asgard from an attack from the Frost Giants instigated by his treacherous brother Loki.
Season 1 Episode 4 of Avengers: Earth's Mightiest Heroes resulted in a 0.00 rating in the 18-49 demographic.
This animated series follows the adventures of the infamous Marvel Comics superhero team the Avengers - primarily consisting of Iron Man, Thor, Captain America, the Hulk, Ant-Man (a.k.a. Giant-Man), Wasp, Hawkeye, and the Black Panther - as they team up to save the world from dangers far too great for one superhero to handle alone.
The Avengers frequently work with S.H.I.E.L.D., a peacekeeping agency run by Nick Fury (while the two aren't competing to save the world by their own means, which are often quite different).