When the Doctor and Rose visit Jackie, they discover that for a few months, there have been silhouettes all across the world that show up at specific times every day. People have come to consider these as ghosts. The Doctor, however, believes they are the impressions of something attempting to enter the universe and follows the source to the Canary Wharf headquarters of a covert organization called Torchwood. According to Yvonne Hartman, director of Torchwood, the ghosts are caused by a spherical “void ship” that is being examined at Torchwood, which has caused a breach in the cosmos. Millions of the ghosts appear globally and transform into their real form—the Cybermen from the parallel universe—after three Torchwood employees are tricked into opening the breach. But the void ship is discovered to contain four Daleks, and the Cybermen just followed it into the breach.