Get out your calendars and grab a pencil — if you’re still going the analog route — Boston Blue has officially found its place on CBS’ fall schedule. We officially know that the Blue Bloodsoff-shoot will arrive on television screens beginning in January, secured in the Friday 10 p.m. time slot. For fans of the original series, the timing will sound eerily familiar. That’s because the show will slide into the same spot that its predecessor used to fill before it was unceremoniously canceled after a successful 14-season run. Marking the return of Donnie Wahlberg’s Danny Reagan, the reveal is terrific for fans who have been struggling for their Blue Bloods fix.