C.D. gets a visit from her mom and deal with her past.

Kate suspends Jinny after she shows up to make an arrest drunk and disheveled. Magda, secretly organizes an intervention in the hopes that Jinny will confront her addiction and go to rehab.

The Division investigates the murder of Sara Allen who was looking for her daughter. At the scene a note was found telling Sarah's daughter that she was a bad mom but was still looking for her daughter. Magda meets "" a floating inspector "" named Regan (who is filling in for Jinny who is on maternity leave) Magda doesn't like Regan and soon learns that the inspector has a lot of questions to answer. As Magda and Regan look into the murder of Sara Allen Regan is looking at footage of a news report and soon sees a suspect on screen. Kate asks Magda to go undercover at a foster care agency to look for the daughter of Sara Allen only to discover that several children are missing. Reagan does some investigating of her own while serving as a guard for Magda. She carries with her a picture of David (the person she saw on the news report)

Jinny is the target of a seemingly random shooting. The efforts of her brothers and boyfriend to make her feel safe do little to alleviate her feelings of vulnerability. CD and Angela investigate the murder of a pizza deliveryman. Magda struggles to resolve her conflicts with Peter.

Jinny finds love after rehab.

Magda's rejection of a judge's sexual overtures endangers the outcome of a trial in which she is a key witness. Much to C.D.'s consternation, her deceased partner's informant, the only suspect in his death, is brought into custody. Kate and her sister must deal with their mother's deteriorating health together—and face their own troubled relationship.

Magda and Jinny investigate the death of a compulsive gambler. C.D. reveals the truth about her partner's death to Angela, putting their personal and professional relationship to the test. Sparks fly and old wounds reopen when Magda bumps into Ben's estranged father, Gabriel.

Jinny & Raina into the deaths of two lovers, the parents of the kids now deal with the news. Magda must decide how handle her relationship with Jonah before Gabe comes back. The crime goes from suicide to murder suicide. Mrs. Johnson is told her son Rob, may have shot Tara because someone tried to get away. Magda wonders if she is pregnant with Jonah's baby, Jinny believes she isn't. Lilly wants to plan a party for Nate, but finds out he loves CD.

To begin the episode real woman what they feel like after being raped. Dr. Anne Polton tells Kate that one of her students was raped and asks that police ask for the help of deaf people because they notice more details that hearing people may miss. Dr. Polton tells Kate she was raped which helps Kate understand her better. CD questions a man who warns that someone may be raped again.

In this episode the whole division is trying to find a baby that was in the backseat of a car during a hijacking.

While at a gun show peter & Magda find out that a dealer sells weapons.

The team learns that a a high school senior Kyle died due to a blow to the head and was killed somewhere else. Kyle's mom and sister identify the body. CD and Raina find Kyle's blood by the school while looking for his bike thinking he went home after his workout. Kate gets the toxicology report saying that steroids where in his body. Nate looks for the file on Kyle that talks about his training record. Angie talks with Jinny who says Kyle stopped taking steroids 6 months ago. The coach tells Nate that Kyle was going to be second string because he wasn't making good plays. CD and Jinny talk with Charlie who was mad that Kyle quit the team. Kyle's mom finds steroids in Rachel bedroom. Raina & CD meet Jack who says the reason Kyle was a threat was because he found out that his sister Rachel was using steroids. Jinny goes to confession and wonders why God to her mom away and she wonders if she can trust God and finds that God was always with her.

Candace (C.D.) and Angela disagree over how to investigate a female murder victim; Jinny thinks she is being punished when she is assigned to a case involving a murdered dog.

Angela looks into the death of a reporter.

Kate learns that a coma victim has awakened after nine years. Kate hopes to solve the case with the help of the victim. Also Regan learns that her son David was accused of stalking someone and is also schizophrenic. Now Reagan asks Kate if she can look at the files. Stacey Reynolds tries to help Emma Weber to reconnect with her family she is worried that her son won't remember her after nine years. Emma identifies the person who killed her husband Evan nine years ago from a picture in the newspaper.

Jinny has to figure out how to tell Jack she is in love with Hank. The Division tries to find out why two gay men were attacked at an AIDS Benefit. Kate tells Sally that Nick may helped attack the two men because his friends did but Sally wants to have the case tried as a hate crime. Kate tells Sally the two men were watching the concert peacefully. Kate talks with a suspect who remembers seeing to girls get angry because their parking spot was taken.

The investigators try to figure out how a small time drug dealer was killed and why. The division learns that Jennifer Davis knew Ray Turner when she was in Las Vegas. Magda tries to learn if Ray was ever abusive to her. Nate tries unsuccessfully to end an affair with Suzanne because he knows her husband is a cop. Stacey learns Mr. Hicks paid a lot of money to mess up a DNA test because he found out that Jennifer Davis isn't the biological daughter of Joe Davis.

Reagan continues to find evidence to prove her son's innocence. When Reagan and Kate try to interview him in prison they don't get much information out of David as to whether he killed Mary O' Reilly. Stacey is asked to help her friend track down his missing sisters. Stacey learns that the missing sisters came from Chechnya . After the sisters of Stacey's friend are located in a truck inside the truck four bodies are found dead due to dehydration. Stacey 's friend is asked to see if he is sister Katrina is one of the bodies in the truck. Miquel tells Magda that Katrina is still missing. Reagan goes to visit David who questions whether he killed Mary and wonders what might happen if he is convicted of the murder.

Magda and Jinnny try to help an elderly woman admit that she's a victim of spousal abuse. Meanwhile, Raina must face her painful past as she takes on a tough murder case that she mishandled a few months earlier when the killer kills again. Can she cut the mustard this time around?

A 12 year old girl goes to school with drugs.

Kate orders an ""all nighter"" to find a Serial Killer that Strikes on a full moon.

Jinny vows to avenge her brother's murder. Kate pays a visit to The Division and has mixed feelings about a new boss taking over. CD tells Nate her fears of almost losing him after he nearly got shot. CD & Nate go to a bar to meet a suspect but end up in a shootout. Raina thinks about dating Johnny. Magda ends her affair with Jonah. Jinny into Ray the man who killed her brother. Kate thinks about leaving her job until she finds out that the new boss is planning to fire Jinny. In a season-ending cliffhanger, one of The Division is shot.

When Magda and Peter bust a meth lab, Magda gets an unpleasant surprise. Jinny goes undercover to bring down the owner of a strip club who forces dancers to have sex with celebrity customers. CD and Angela investigate the death of an homeless man and try to figure out how he got to the streets . Kate is having a relationship with a younger man, the assistant district attorney.

Kate gets close to being named Police Chief and asks everyone to not say anything. The team tries to find stolen evidence that was to be used in trial. They wonder if Evan took the evidence & Kate looks at EKG charts but doesn't see the red line. The team wonders if the doctor killed his wife Mary for money but Mary is alive. Nate & CD talk with Mary and ask if she knew why a dead body was used to commit Insurance Fraud. Kate is told she is Chief of Police but her problems is just starting.

The inspectors look into the mysterious kidnapping of a young lady named Melissa and wonder if the kidnapping is real. Raina questions Tom about the disappearance of his stepdaughter Melissa leaving Nate and Raina to wonder if Tom is telling the truth. Magda tries to figure out if she did anything wrong the night her husband returned home from a music tour. Jinny tries to get Magda to understand what she would do if the situation were reversed (if her husband had an affair) The disappearance of Melissa starts to get really strange when Melissa arrives at the San Francisco police department giving everyone there a big shock. The inspectors also learn that Melissa's father is a sexual predator.