Keep your friends close, your enemies closer, and your evil brother closest of all.

That's what Thor (Chris Hemsworth) plans to do when an ancient race of powerful beings threatens Earth and all the Nine Realms. To save them, he needs help ... from Loki (Tom Hiddleston).

In this new clip from the upcoming Marvel film, Thor goes to his brother with a deal: Help him and be freed from his cell, which he's been in for a year after the events of "The Avengers."

"You must be truly desperate to come to me for help," an amused Loki notes. Does Thor really trust his scheming sibling? And will Loki take his offer?

Watch below. "Thor: The Dark World" opens November 8.



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