Marvel Studios aired a 60-second TV spot for Thor: The Dark World during tonight's episode of Marvel's Agents of S.H.I.E.L.D. on ABC. We see Thor (Chris Hemsworth) explaining to Jane Foster (Natalie Portman) that, once every 5,000 years, the worlds align, which allows a darkness to strike, in the form of Malekith the Accursed (Christopher Eccleston). We also see new footage of Darcy Lewis (Kat Dennings), who comments on Thor's massive physique in director Alan Taylor's sequel, arriving in theaters November 8.