The shooting of Marvel's new show "Agents of S.H.I.E.L.D." shocked bystanders in Stockholm yesterday with this unusual sight.

Several scenes were shot with actress Pascale Armand as well as a huge crowd of extras, all dressed alike in proper suits and red masks, MovieZine readers told us.

Who is she playing, who are the men she's chasing, and what's with the briefcases chained to their wrists? It is all part of the big Marvel mystery, about to be unveiled on September 24th when "Agents of S.H.I.E.L.D." has it's US premiere. However, we do have some behind-the-scenes pics from our readers to tease your curiosity - take a look below.

For more images from "Agents of S.H.I.E.L.D." visit our gallery »

The scenes set in the Swedish capital will be seen in episode 4.