8.1/10508 votes#1 - Unwritten Rules
Season 4 Episode 1 - Aired 9/27/2013
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.
Director: David Barrett
Writer: Ian Biederman
8.2/10488 votes#2 - The City That Never Sleeps
Season 4 Episode 2 - Aired 10/4/2013
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.
Director: John Behring
Writer: Kevin Wade
8.5/10536 votes#3 - To Protect and Serve
Season 4 Episode 3 - Aired 10/11/2013
Danny becomes the lead hostage negotiator when a prime informant in a large drug case holds Erin at gunpoint inside the courtroom.
Director: Peter Werner
Writer: Siobhan Byrne O'Connor
8.1/10461 votes#4 - The Truth About Lying
Season 4 Episode 4 - Aired 10/18/2013
A teen girl dies after she is seemingly pushed in front of a subway car by a homeless man; Frank is irritated by having to meet with the new inspector general (Bebe Neuwirth).
Director: Robert Duncan McNeill
Writer: Brian Burns
8.0/101,142 votes#5 - Lost and Found
Season 4 Episode 5 - Aired 10/25/2013
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.
Director: Alex Chapple
Writer: Daniel Truly
7.8/10449 votes#6 - Growing Boys
Season 4 Episode 6 - Aired 11/1/2013
Jamie's conduct is questioned when a suspect he was pursuing is fatally injured; Baez goes under cover to investigate a drug dealer -- the fiance of Danny's ex-girlfriend (Charisma Carpenter).
Director: Eric Laneuville
Writer: Willie Reale
8.0/10426 votes#7 - Drawing Dead
Season 4 Episode 7 - Aired 11/8/2013
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 Baez investigate the murder of a Wall Street securities trader who was deep in debt due to a gambling addition.
Director: Ralph Hemecker
Writer: Ian Biederman
8.1/10457 votes#8 - Justice Served
Season 4 Episode 8 - Aired 11/15/2013
Frank is put in danger when his dinner companion, mob lawyer Angelo Gallo, is shot; Danny is a juror in a murder trial.
Director: David Barrett
Writer: Siobhan Byrne O'Connor
8.0/10444 votes#9 - Bad Blood
Season 4 Episode 9 - Aired 11/22/2013
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.
Director: Robert Harmon
Writer: Daniel Truly
7.5/10444 votes#10 - Mistaken Identity
Season 4 Episode 10 - Aired 12/13/2013
Danny and Baez investigate a local bombing, but meet 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.
Director: David Solomon
Writer: Ian Biederman, Diana Son
7.9/10418 votes#11 - Ties That Bind
Season 4 Episode 11 - Aired 12/20/2013
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.
Director: Christine Moore
Writer: Brian Burns
8.1/10444 votes#12 - The Bogeyman
Season 4 Episode 12 - Aired 1/10/2014
Danny is after the distributor of a deadly new street drug.
Director: David Barrett
Writer: Ben Cummings, Orson Cummings, Kevin Wade
8.1/10452 votes#13 - Unfinished Business
Season 4 Episode 13 - Aired 1/17/2014
Danny and Baez search for a Marine veteran who may have PTSD; a woman seeking justice for her murdered daughter catches Frank off-guard during a press conference.
Director: Alex Chapple
Writer: Siobhan Byrne O'Connor
7.5/10563 votes#14 - Manhattan Queens
Season 4 Episode 14 - Aired 1/31/2014
A popular drag queen and reality-TV star is found dead in a park; the mother of an accused man abducts Erin.
Director: Donnie Wahlberg
Writer: Willie Reale
8.0/10460 votes#15 - Open Secrets
Season 4 Episode 15 - Aired 2/28/2014
A kidnapping investigation brings back bad memories for Danny, who worked a similar case years ago; Frank and Inspector General Peterson butt heads.
Director: Eric Laneuville
Writer: Ian Biederman
8.0/10443 votes#16 - Insult to Injury
Season 4 Episode 16 - Aired 3/7/2014
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.
Director: David Barrett
Writer: N/A
7.8/10421 votes#17 - Knockout Game
Season 4 Episode 17 - Aired 3/14/2014
Danny and Baez search for teenager who have been randomly punching unsuspecting people in the head, including a pregnant woman; Frank worries that promoting an officer will be viewed as favoritism.
Director: Robert Harmon
Writer: Brian Burns
8.0/10416 votes#18 - Righting Wrongs
Season 4 Episode 18 - Aired 4/4/2014
A woman dies after undergoing a secret plastic surgery, so Danny and Baez try to figure out what happened. Elsewhere, Frank asks Jamie to solve a cold case; and Erin explores the world of speed dating.
Director: Alex Zakrzewski
Writer: Siobhan Byrne O'Connor
7.9/10420 votes#19 - Secret Arrangements
Season 4 Episode 19 - Aired 4/11/2014
A college professor involved with a questionable scholarship program is murdered; Danny is investigated for ethical and procedural violations.
Director: Tawnia McKiernan
Writer: N/A
8.0/10424 votes#20 - Custody Battle
Season 4 Episode 20 - Aired 4/25/2014
Erin investigates a case involving a police officer accused of killing a suspect in custody; Jamie encourages Eddie to forgive her father.
Director: Alex Chapple
Writer: Ian Biederman
8.1/10403 votes#21 - Above and Beyond
Season 4 Episode 21 - Aired 5/2/2014
After a detective from Danny's precinct is killed while working undercover, Frank goes above and beyond to find the killer only to discover that the victim held a big secret; Jamie and Eddie help Nicky track down a homeless former classmate.
Director: Greg Beeman
Writer: Daniel Truly
8.4/10455 votes#22 - Exiles
Season 4 Episode 22 - Aired 5/9/2014
Danny uncovers shocking information while investigating a case against orders.
Director: David Barrett
Writer: Kevin Wade
The Best Episodes of Blue Bloods Season 4
Every episode of Blue Bloods Season 4 ranked from best to worst. Discover the Best Episodes of Blue Bloods Season 4!
A drama about a multi-generational family of cops dedicated to New York City law enforcement. Frank Reagan is the New York Police Commissioner and heads...
Genres:CrimeDrama
Network:CBS
Season 4 Ratings Summary
"Unwritten Rules" is the best rated episode of "Blue Bloods" season 4. It scored 8.1/10 based on 508 votes. Directed by David Barrett and written by Ian Biederman, it aired on 9/27/2013. This episode is rated 0.1 points higher than the second-best, "The City That Never Sleeps".