S1E20
The Casket of Ancient Winters
⚠ Spoiler alert This recap gives away what happens in this episode.
Episode Summary & Review
Aired 2011-05-15 on Disney XD.
The Avengers must stop Malekith the Accursed after he unleashes an everlasting winter on Earth. Once Malekith is defeated Thor learns he has been barred from returning to Asgard.