“Bones” has extended its offnet syndie deal through 2013.Twentieth Television has reupped the show with Fox, Tribune, Local TV and Sinclair stations. Drama, starring Emily Deschanel and David Boreanaz, has been sold to more than 85 markets, which reps 70% of the country. Among the top markets are New York, Los Angeles and Chicago. According to Nielsen, out of this season’s 13 weekly syndicated dramas, “Bones” is the second highest rated with a 2.7 household rating. The primetime “Bones,” from Twentieth Century Fox Television, airs 8 p.m. Thursday on Fox. Hart Hanson, Barry Josephson, Ian Toynton and Stephen Nathan are exec producers.