Season 4

Episode Guide

Unwritten Rules

S4 E1
Sep 28, 2013
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.

The City That Never Sleeps

S4 E2
Oct 5, 2013
When a famous movie star, Russell Berke, who shadowed Danny for research on his next role, is stabbed, Danny goes to his aid, but must keep the crime on the down-low due to Russell's celebrity status. Marc Blucas guest stars as Russell Berke.

To Protect and Serve

S4 E3
Oct 12, 2013
Danny becomes the lead hostage negotiator when a prime informant in a large drug case holds Erin at gunpoint inside the courtroom. Also, when Jamie disobeys his lieutenant's orders and gets suspended, Frank must decide a proper punishment.

The Truth About Lying

S4 E4
Oct 19, 2013
Danny and Baez investigate the death of a teenage girl who appears to have been pushed in front of a subway car by a homeless man. Meanwhile, Frank is annoyed at having to meet with the newly appointed Inspector General who will now have oversight of NYPD policy. Bebe Neuwirth guest stars as the new Inspector General, Kelly Peterson.

Lost and Found

S4 E5
Oct 26, 2013
When Danny and Baez suspect a little girl might be the victim of a kidnapping, the girl's mother denies it, but her story doesn't add up. Meanwhile, Frank pays a visit to a priest, a counselor to the NYPD, who was arrested on a DUI charge.

Growing Boys

S4 E6
Nov 2, 2013
When a gangbanger dies after Jamie chases him away from the boy he is mentoring, Jamie's conduct is called into question. Meanwhile, Baez goes undercover to get information on Danny's ex-girlfriend's fiance who is dealing drugs from his gym. Charisma Carpenter guest stars as Danny's ex-girlfriend.

Drawing Dead

S4 E7
Nov 9, 2013
When an officer is accused of using excessive force on a suspect, Frank finds his department under scrutiny from the community and the mayor. Meanwhile, Danny and Maria investigate the murder of a Wall Street securities trader who was deep in debt due to a gambling addiction. Aida Turturro and Bruce Cutler guest star.

Justice Served

S4 E8
Nov 16, 2013
Following Frank's dinner with mob lawyer Angelo Gallo, Gallo is shot, and Frank narrowly escapes with his own life. Meanwhile, Danny is called for jury duty, and winds up being the sole dissenting opinion in a murder trial. Chazz Palminteri guest stars.

Bad Blood

S4 E9
Nov 23, 2013
Danny and Baez investigate a homicide in which Baez's estranged brother, a former drug addict, is the lead suspect. Meanwhile, Frank learns one of his most highly decorated officers, a German Shepherd in the K9 unit, is being accused of police brutality, and Henry investigates the widow of a former NYPD pal who might have had a hand in her husband's death. Kirk Acevedo guest stars.

Mistaken Identity

S4 E10
Dec 14, 2013
Danny and Maria investigate a local bombing, but are met with tension and resistance from the community during the investigation. Meanwhile, Frank must deal with the political fallout when a man punches an officer who was overly aggressive in his questioning.

Ties That Bind

S4 E11
Dec 21, 2013
Danny's loyalty is tested when he is assigned to the case of a childhood friend, Mickey, who is under investigation for having ties to an infamous mob family. Meanwhile, Frank gets word that crime is on the rise due to a recent judicial ruling about the legality of the "stop and frisk" policy. Tom Cavanagh and Rebecca Budig guest star.

The Bogeyman

S4 E12
Jan 11, 2014
When Danny learns from Nicky that there's a deadly new brand of heroin hitting the streets, he begins an all-out manhunt for the distributor. Meanwhile, Frank pulls out all the stops to assist in getting the drugs off the street.

Unfinished Business

S4 E13
Jan 18, 2014
Danny and Maria must track down an Army veteran who Danny thinks is suffering from PTSD. Meanwhile, Frank is caught off-guard during a press conference by a woman who is seeking justice for her murdered daughter. Karen Allen guest and Doug E. Doug guest star.

Manhattan Queens

S4 E14
Feb 1, 2014
Danny and Baez investigate the murder of Tiffany Lamp, a popular drag queen from a reality television show who was found murdered in a local park. Meanwhile, Erin reexamines a drug case scheduled for trial after she is abducted by the accused man's mother. Series star Donnie Wahlberg directs BLUE BLOODS for the first time.

Open Secrets

S4 E15
Mar 1, 2014
When Danny and Maria investigate the kidnapping of a young girl who disappeared after school, it brings back difficult memories for Danny, who worked on a similar unsolved case many years ago.

Insult To Injury

S4 E16
Mar 8, 2014
When Danny takes a call from a woman who is threatening to kill herself along with the man who killed her parents in a drunk driving accident, he rushes to find her. Meanwhile, Frank accompanies his grandson, Sean, on a class field trip and struggles to get the lead chaperone to loosen the reigns so the kids can have fun.

Knockout Game

S4 E17
Mar 15, 2014
Danny and Maria investigate when an expectant mother is a victim of a "knockout game," in which teenagers punch unsuspecting civilians in the head. Meanwhile, Frank wrestles with promoting an officer when he thinks it can be viewed as favoritism.

Righting Wrongs

S4 E18
Apr 5, 2014
Danny and Baez investigate the death of a woman whose body was dumped after she was killed by a lethal dose of lidocaine following secret plastic surgery. Meanwhile, Frank privately assigns Jamie a cold case and Erin tries out speed dating. Holt McCallany guest stars.

Secret Arrangements

S4 E19
Apr 12, 2014
Danny and Maria investigate the murder of a respected college professor who was involved with a questionable scholarship program. Meanwhile, Danny discovers that his father didn't tell him that the District Attorney is investigating Danny for ethical and procedural violations.

Custody Battle

S4 E20
Apr 26, 2014
When Erin is assigned to investigate a case in which an on-duty police officer is accused of killing a suspect already in custody, Frank urges her to stick to the facts to avoid a publicity scandal for the NYPD. Meanwhile, Jamie urges Eddie to forgive her father for his past mistakes.

Above And Beyond

S4 E21
May 3, 2014
When a detective from Danny's precinct is killed while working undercover, Frank puts on a full-court press to find his killer, only to discover that the deceased had a big secret. Meanwhile, Jamie and Eddie help Nicky track down a former classmate who is living on the streets.


S4 E22
May 10, 2014
When Danny is placed on modified duty after investigating a case that was off-limits, he realizes he stumbled upon something that someone is trying to keep quiet. When he passes the tip on to his father, Frank is alarmed when he learns the enormity of this case and the internal involvement.