Magda and Jinny attempt to help a troubled teen take responsibility for her actions. During a stakeout, Angela and C.D. evaluate their partnership. Kate ruffles the feathers of her future son-in-law when she takes charge during her daughter's medical crisis. Will the young couple's relationship weather this storm?

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.

Jenny is back from rehab.

A Fromer rock star is Murdered.

Jinny's Dad is hospitalized which brings the family together. Magda and Gabe are desperate to find a bone marrow donor for Ben as he is not responding to the treatments. Kate gets an offer from Louis that is too hard to pass up, and C.D. and Nate close in on the white supremacist killer terrorizing San Francisco.

A mom shoots a child molster and kate is almost shot. sparks begin To fly between Jack and Jinny.

CD and Nate find out if a woman was raped by her best friend's boy Friend; Kate wonders if her relationship with Louis will continue.

CD & Nate look into the case of a woman who may have left her baby daughter behind. Will Jinny leave AA for good?

Jinny learns her brother a cop died. Also CD & Nate look into the case of a psychiatrist who may have raped a patient with MPD (Multiple Personality Disorder) The psychiatrist says ""Liz"" is highly charged but says he didn't rape Christine.

CD & Nate ask about Jinny who misses her brother. Jinny tells Jack her brother's locker will be cleaned out. Jack thinks Jinny is on drugs. Magda wonders if the relationship with Jonah should continue. Magda realizes her affair with Jonah is going to far.

The funeral of John Exstead Jr. leaves Jinny in a blanket of memories.

Jinny learns that Jack will move, the team watches a crime about to happen. Kate begins her recovery. Magda tells Jonah she might be having a baby, Jonah isn't ready for kids.

Kate comes home from the hospital CD & Nate try to catch prisoners who escape custody hurting Nate. Jinnny & Magda talk about if she will have a baby while waiting for Gina Bracken. None of the team likes the new captain because he wants everything done by the book.

Gabe is disappointed that she isn't pregnant. Kate asks to be updated on things, she can't get used to having a stroke.

Jinny leans that the gun that was used to kill a Marshal also killed her brother John.

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.

In this episode Nate gets Raina as a partner because CD dumped him. Jinny tells Magda that she got divorce papers from Jack. Raina tries to find out why CD left. Kate considers hiring Stacy Newland to help Kate.

Amy whose husband hit her is killed by ""Buzz"" their pit bull was going to be trained as a guard dog. Jinny meets Hank Riley a sketch artist but doesn't seem ready for love.

Jinny tells Kate that she is pregnant and is told to stay off the streets and work behind a desk Jinny is unhappy with the policy regarding police officers that are pregnant and wishes she could be on the streets until she goes on maternity leave. Now she has to tell hank that he is about to be a father.

Jinny tells hank that he will be a father but as he learns this news from jinny Nate eavesdrops on the conversation between Jinny and Hank while he is waiting to ask a favor of Jinny . Nate asks Jinny to supervise a search while he goes and speaks with the District Attorney.

Lisa learns that her husband is a rested for selling drugs and now must talk to the investigators and try to get her husband's charges reduced.

The Division is on the hunt for a serial killer who left a body in a local landfill. Another missing woman supposedly left a message on her computer that read ""I am okay"".

Stacy gets a surprise visit from her former fiance and tries to explain why she left him at the altar. The missing woman's therapist tells Kate that she believes one of her patients may have had something to do with the disappearance of her.

Raina meets Johnny's former girlfriend who asks that Raina stop dating Johnny so she can go back to dating him.

The inspectors try to figure out why a high school student was shot. The principal of her school doesn't believe that it is a serious problem. Later, a car is set on fire in the school parking lot. Jinny talks with Hank about having their wedding held at her father's home and trys to convince him to let Casey and his partner get married there as well. The detectives discover a cryptic website with horrific threats that will keep you in suspense until part two of this two parter.

Kate, Raina, Nate, Magda, and Jinny must find a way to get Stacy, the principal, and 10 students out of the school safe and sound when they're held hostage by armed terrorists. The team meanwhile must figure out who these people are and why they're doing this. Also, Jinny and Hank get married.