Persons not known is an American puzzle drama tv show that revolves round strangers who are imprisoned in a ghost town that is small. The thirteen-episode summer series premiered on June 7, 2010 in 10:00 p.m. on NBC. On June 30, NBC moved the series to 8:00 p.m. on Saturday from its Monday timeslot. It completed its conduct on August 28, 2010. The show was canceled.