on Earth. They learn that Malekith plans to restore the Dark Elves to dominance by unleashing the Aether at the center of the Convergence in Greenwich. Thor battles Malekith through various portals and across multiple worlds until one portal separates them, leaving Malekith unopposed on Earth. Thor returns in time to help his mortal comrades use their scientific equipment to transport Malekith to Svartalfheim, where he is crushed by his own damaged ship. Thor returns to Asgard, where he declines Odin's offer to take the throne and tells him of Loki's sacrifice. As he leaves, Odin transforms into Loki, who is alive and impersonating Odin. In a mid-credits scene, Volstagg and Sif visit the Collector and entrust the Aether to his care, commenting that with the Tesseract already in Asgard, having two Infinity Stones so close together would be unwise. As they leave, the Collector states his desire to acquire the other five Stones. In a post-credits scene, Foster and Thor reunite on Earth, while somewhere in London, a frost monster from Jotunheim—accidentally transported to Earth during the final battle—continues to run amok. Cast Chris Hemsworth as Thor: An Avenger and the crown prince of Asgard, based on the Norse mythological deity of the same name. Hemsworth stated that the film addresses unresolved issues regarding Thor's relationships from previous films, "For Thor and Jane, there are some unanswered questions now, since obviously he didn't stop in and catch up with her in The Avengers. Thor might have some explaining to do in this one. And with Loki, we get down to the major bones of our conflict with everything that's come from Thor to Avengers to now." Hemsworth added, "Thor's journey I think picks more so up from where we left the first one—About to take on the throne... and now coming to the realization of what responsibility comes with that. Also, Alan [Taylor] keeps talking about the dark side of that responsibility, and the secrets of being king or becoming sort of very political about what people need to know and what they want to know." Hemsworth especially enjoyed the role of Thor in this film as he was able to, "... break him down and find his human qualities and his vulnerable side." Natalie Portman as Jane Foster: An astrophysicist and Thor's love interest who is brought from Earth to Asgard by Thor after she is infected with