On Earth, Lewis, who has tried in vain to reach S.H.I.E.L.D., has Selvig released from a hospital's mental ward with the help of her own intern, Ian. With Fandral's help and a separate flying boat, they escape pursuing Asgardian forces. With Volstagg and Sif guarding his flank, the two commandeer a Dark Elf spaceship and escape with the Foster. Following Frigga's funeral, Thor reluctantly teams with Loki, who knows a secret passage out. Foster there is only a hologram, however the real Foster is with Thor, who has been ordered to remain and protect Asgard, not pursue the retreating invaders. Malekith and his forces, awakened by the release of the Aether, attack Asgard and turn Algrim into an enhanced warrior called 'the last of the Kursed.' Malekith and Algrim find Foster in Frigga's chambers, and kill Frigga. In holographic form, Frigga visits Loki in his cell to convey her love and disappointment. Frigga - Odin's wife, Thor's mother and Loki's adoptive mother - takes Foster under her wing. Odin realizes she is the Aether's vessel and this heralds a catastrophic prophecy. Sensing the force's unearthly nature, Thor brings Foster to Asgard, but its physicians, including Eir, cannot remove it. She has awakened in the factory after hours in the other realm, and finds herself releasing powerful energy when a police officer on the scene touches her. When Heimdall tells Thor that Foster is no longer on Earth, Thor begins a search for her there. The Asgardians learn a rare alignment of the cosmic Nine Realms is imminent, and at spots where the Realms touch, as at the factory, passages are created. Foster, after bringing her own scientific equipment to the factory, is sucked into a vortex where the Aether enters her. Erik Selvig has apparently gone mad and has been detained after attempting to conduct scientific experiments at Stonehenge naked. She takes Foster to an abandoned factory where the laws of physics are upended in spots and some children have found that objects thrown down a stairwell reappear above them or else vanish. In London, astrophysicist Jane Foster, who has not seen Thor in that time, attempts a lunch date with a man named Richard but is interrupted by her intern Darcy Lewis. In the present, in Asgard, Loki stands before Odin in shackles and is sentenced to prison, while Thor, alongside warriors Fandral, Volstagg and Sif repeal invaders from Vanaheim, home of their comrade Hogun it is the final battle in a two-year war. Unbeknownst to him, Malekith, his lieutenant Algrim and others escape into suspended animation. Fighting off Malekith's enhanced warriors the Kursed, Bor contains the Aether within a stone column. Eons ago, Bor, father of Odin, vanquished the Dark Elves led by Malekith, who sought to return the universe to its state before creation using a force called the Aether.

Cast of thor the dark world