"Unwritten Rules" — 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.

CHEAT TWEET:  The Reagans gang up on Erin after she releases an NYPD murder suspect – all NEW season of #BlueBloods 9/27, 10 pm ET/PT http://bit.ly/150gp7D

SERIES REGULARS:

Tom Selleck     (Frank Reagan)

Donnie Wahlberg     (Danny Reagan)

Bridget Moynahan     (Erin Reagan-Boyle)

Will Estes     (Jamie Reagan)

Len Cariou     (Henry Reagan)

Marisa Ramirez     (Det. Maria Baez)

Amy Carlson     (Linda Reagan)

Sami Gayle     (Nicky Reagan-Boyle)

RECURRING CAST:

Tony Terraciano     (Jack Reagan)

Andrew Terraciano     (Sean Reagan)

Abigail Hawk     (Abigail Baker)

Gregory Jbara     (DCPI Garrett Moore)

Vanessa Ray     (Eddie)

John Ventimiglia     (Dino Arbogast)

GUEST CAST:

Amy Morton     (Amanda)

Malcom Goodwin     (Angelo)

Auden Thornton     (Angie)

Ryan Johnston     (Joey)

Ejyp Johnson     (Trevor)

Sylvia Kauders     (Mrs. Caruso)

Josh Tower     (Detective Donnelly)

James Martinez     (Salazar)

Racine Russell     (Uniform # 1)

Amanda Holston     (Officer Collins)

Kathleen McNenny     (ER Doctor)

WRITTEN BY:  Ian Biederman

DIRECTED BY:  David Barrett

GENRE:  DRAMA

RATING:  TBD

Photos are available on www.cbspressexpress.com

Website: http://www.cbs.com/primetime/BlueBloods

Facebook: http://www.facebook.com/#!/CBSBlueBloods

Twitter: http://twitter.com/#!/BlueBloods_CBS

CBS Twitter: http://twitter.com/#!/CBSTweet

Talent on Twitter:

Donnie Wahlberg @DonnieWahlberg

Amy Carlson @TheAmyCarlson

Sami Gayle @Gayletweets8

Press Contacts:

Amy Miller                212-975-4757             amy.miller@cbs.com

Meredith Tiger           212-975-3829             mftiger@cbs.com                       

Photo Contacts:       

Richard Boeth          212-975-7627             richard.boeth@cbs.com

Kathleen Tanji          818-655-1542             kathleen.tanji@cbs.com