Well, looks like last episode's rift opening did actually have some lingering effects. People and things from different time periods are popping up all over the world, causing the usual complications: Roman soldiers in the lockup, bubonic plague spreading and virulent. The gang, minus Jack, all start hallucinating. Tosh's dead mother warns her that something's coming out of the darkness. Gwen sees a vision of Bilis from last episode apologizing. Ianto's dead girlfriend tells him to open the rift. Owen sees Diane, and gets right pissed at Jack and storms out.