Thor needs more than a magic hammer this time — he needs help from his evil adopted brother, Loki
Thor must be truly desperate to come to Loki for help, the bad guy opines in the extended "Thor: The Dark World" TV spot.
He is, when faced when an enemy that even Odin and Asgard cannot withstand.
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The family reunion will not be all hugs and nostalgia.
Watch the sneak peek: