 Gwen remembers a name tag worn by the boy, and the team is able to track the name down to an old man in Cardiff who admits that during the World War II evacuation, he was sent to Cardiff.The group determines from further analysis that the nanotechnology of the "ghost device" allows people to see moments of the past spurred by strong human emotions, and try to learn how their suspect came upon such technology.They determine the suspect is Sean "Bernie" Harris, a petty thief from Splott, and travel there to find him.