TNT is expanding its slate of unscripted dramas with the addition of two exciting new series: the police procedural docu-drama BOSTON BLUE (working title), from executive producer Donnie Wahlberg (“Blue Bloods,” “Boomtown”), and the high-octane competition series 72 HOURS (working title), from the executive producer of “Extreme Makeover” and “The Moment of Truth.” TNT has ordered eight episodes of each series, with plans to launch them in 2013.