"The invaders operate from secret catacombs in the heart of the city. Among their powers is an ability to put all the residents to sleep at the same time. While unconscious, they become subjects in an elaborate experiment involving injections through the forehead that mix and match people's memories. It is all a search for (get this!) the human soul. The Strangers also have the telekinetic ability to move objects, and during these blackouts in which time appears to stop, they rearrange the city's architecture. In the movie's most visually striking sequences, buildings shift, and the entire metropolis heaves into a different configuration."