Blue Bloods - Episode 4.01 - Unwritten Rules - Sneak Peek

When an armed robbery ends with the death of a police officer, Frank makes it a mission for the NYPD to bring the suspect to justice. However, tensions run high in the Reagan household when Erin drops the charges and releases the suspect due to lack of evidence, on the fourth season premiere of BLUE BLOODS, Friday, Sept. 27 (10:00-11:00 PM, ET/PT) on the CBS Television Network.

Airdate: 09/27/2013