Watch the Marvel Universe Sunday Mornings on Disney XD! Watch the Marvel Universe Sunday Mornings on Disney XD!

Thor races back to Earth to discover that one of the Avengers' greatest villains has taken control of the planet.

"Planet Doom" clip

Thor races back to Earth to discover that one of the Avengers' greatest villains has taken control of the planet.

Thor races back to Earth to discover that one of the Avengers' greatest villains has taken control of the planet.

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