1. Season 4 Episode 1 - Blue Bloods - "Unwritten Rules"
When an armed robbery ends with the death of a police officer, Frank (Tom Selleck) 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. Photo: John P. Filo/CBS ©2013 CBS Broadcasting Inc. All Rights Reserved.