May 15, 2011
The Casket of Ancient Winters is the twentieth episode of Avengers: Earth's Mightiest Heroes.
The Avengers must stop Malekith the Accursed after he obtains the Casket of Ancient Winters.
Malekith betrayed Loki by keeping the casket for himself, but when the Avengers stop him, the Enchantress and Executioner got away with the casket for Loki. At the very end, when Thor opens a portal to Asgard, he realized that he mysteriously couldn't return back.
- Hawkeye's remark that they should move out the west coast is a reference to the fact that in the comics, for a time the Avengers were divided into two separate teams on each coast.
- This episode has the first appearance of the different intro from Season 2 with 8 heroes from Season 1.