‘Blue Bloods’ Season 4 Trailer: When an Officer Goes Down, the Reagans Step Up

Blue Bloods Season 4 Premiere (4)

Blue Bloods season four begins with new partnerships and the family divided when a cop is killed and Erin is forced to let him go because of a lack of substantial evidence. The new trailer does an excellent job of both emphasizing the drama to come and the potential for lighter stories as Jaime finds himself with a (very pretty) rookie partner. Check out the trailer below. Are you ready to rejoin the Reagan family? And how do you think Erin and Frank will work out their differences when faced with such a complex case?

Blue Bloods season four premieres Friday, Sept. 27th at 10:00-11:00 PM, ET/PT on CBS. See the premiere photos here.