Attacks at a high school culminate in the slaying of a teacher and students being trapped inside the building.
The investigators fight to resolve a hostage crisis at a local high school; Jinny and Hank marry.
A prominent doctor is a suspect in his wife's murder; Kate finds herself alone when Jill takes Katie-Ann to Los Angeles.
The investigators believe they are in the middle of a gang war; Stacy must make a decision about her ex-fiance.
The detectives delve into the personal life of a district attorney when he is found murdered; Raina poses as a prostitute; serving subpoenas turns deadly for Stacy.
The detectives race against time to find Raina and the people who are responsible for her abduction.
Raina and her boyfriend face a crossroads in their relationship; Stacy gets a visit from a former fiance; the detectives search for a serial murderer.
Stacy uses her skills to help a friend search for her missing sisters.
A victim of a violent crime awakens from a coma after nine years.
The city's foster homes are investigated after a recovering drug addict suspects her child is being abused.
Someone murders a small-time drug dealer; Nate ends his affair with Suzanne.
The search for a kidnapped teenage girl takes an unexpected twist; Magda and Gabe rekindle their marriage.
A deadly car bombing leads the investigators to a family riddled with greed; Jinny grapples with pregnancy; Kate deals with family issues.
Raina and Nate arrest a businessman for drug trafficking; Nate begins an affair with a married woman; Jinny tells Hank that she is pregnant.
The investigators search for the murderer of a child molester; Stacy and Raina become roommates; Raina struggles with her past.
Jinny and Magda investigate a fire and stampede in a nightclub.
Two gay men are are attacked after an AIDS benefit concert.
Nate and Raina investigate a suicide of a mentally impaired man living at the same assisted-living facility as Nate's sister.
A professional baseball player is accused of rape.
A woman's compulsive sexual behavior may gotten out of control; Internal Affairs investigates Jinny; Magda fights to save her marriage.
Jinny and Magda rush to find a dangerous burglar; Raina's relationship with a baseball player takes on new considerations.
The squad investigates a pit bull attack; Jinny meets a new man; Kate receives an unexpected gift from her daughter.
The inspectors continue to hunt for three escaped convicts; Kate has second thoughts about her resignation; Jinny comes face to face with her brother's murderer; C.D. and Nate admit their feelings for each other.
The inspectors search for three escaped prisoners; Kate learns she will not become police chief; Jinny says goodbye to Jack; Magda finds out she is not pregnant.
Raina monitors Kate's recovery; the inspectors investigate the suicide of two teenagers; Lily and C.D. throw Nate a surprise party.
Kate begins to recover from a stroke; Magda encourages Jinny to start seeing a therapist; investigating the murder of a young woman.
Evidence is stolen from the morgue in a high-profile case; Kate is her own worst enemy in becoming the next chief of police.
Kate finds herself in a difficult political position; Raina must confront the truth about her biological parents.
The inspectors investigate the death of a high-school football player; Nate and Lily redefine their relationship; Jinny seeks guidance from a higher power.
Jack and Magda help Jinny confront her addiction; Raina, C.D. and Nate investigate a robbery homicide outside an AIDS hospice.
C.D. and Nate investigate a psychiatrist accused of rape; Magda contemplates having an affair with Jonah; Jinny's brother dies in the line of duty.
The daughter of a wealthy businessman is kidnapped; Magda accepts a dinner date with Jonah; Jinny grows more dependent on a prescription drug.
The inspectors search for a hired killer suspected in the death of a wealthy businessman; the race for police chief heats up.
Magda and Raina investigate a woman accused of child abuse; C.D. and Nate investigate a restaurant robbery; Jack confronts Jinny.
Jinny and Magda investigate the murder of a lawyer; Jinny may be trading one addiction for another; C.D. invites Nate and Lily to dinner.
Raina helps C.D. investigate an abandoned newborn; Jinny thinks about quitting Alcoholics Anonymous; Gabe and Magda look for a way out of their financial problems.
A woman's body turns up under the Bay Bridge; Kate faces a political bombshell when a friend endorses the use of marijuana for medical purposes.
Raina helps C.D. and Nate investigate a stalking case involving a wealthy woman; Magda and Gabe put their house up for sale.
Nate and CD go undercover to help Nate's ex-partner; Raina investigates the hit-and-run of a 7-year-old girl.
A serial rapist targeting disabled and hearing-impaired women on a college campus prompts a hearing-impaired professor to contact the police.
CD, Nate and Raina investigate the murder of a college student whose life was being web-cast; the anniversary of Jinny's mother's suicide.
Kate is offered an exciting career opportunity just when she and Louis decide to take the next step in renewing their relationship.
C.D. is forced to confront painful memories from her past when her mother pays a surprise visit; Jinny and Raina probe the death of a wealthy drug addict. Tess Harper guest stars.
Inspector C.D. Lorenzo and her partner investigate the kidnapping of a little girl right out of her own bedroom.
Jinny's father collapses; Magda and Gabe search for a bone-marrow donor; C.D. prepares for a romantic vacation with Brian; Raina passes the inspector's exam.
C.D. and Nate are on the trail of a killer; Jinny finds out her father has been keeping a secret; Raina takes the inspector's exam.
Two disgruntled employees take over a bus full of hostages; Magda and Gabe come to terms with Ben's leukemia.
C.D. and Nate search for a serial killer; Jinny wants to rekindle her relationship with Teddy; Magda helps a young woman who claims her mother's killer is harassing her.
Jinny's sponsor slips back into drinking.
Before Magda's wedding, she and Jinny try to catch a serial "hair bandit."
A judge may be involved in a young woman's murder.
A teenager overdoses at a rave.
Jealous co-workers may be involved in a woman's murder.
A 12-year-old girl goes to school with a backpack full of heroin.
Kate's friend leads a fight to release a talented artist who is a convicted killer.
A man kidnaps his children and forces his ex-wife to falsely confess to the crime.
Jinny and Magda investigate the apparent murder of a former rock star.
A psychic helps to find a missing girl.
Jinny and Magda investigate the vehicular murder of a suburban mother.
Jinny kills a man who is beating a drug dealer to death.
Jinny and Madga suspect that a wealthy older woman may be the victim of abuse.
A woman comes to the precinct with information about a bomber.
C.D. and Joe discover the body of a woman wrapped in a bed sheet in a garbage dump.
Jinny and Magda investigate the murder of a man by his wife's son.
Kate, Jinny and Magda investigate a politician for the suspected killing of a missing intern.
Jinny returns from rehab and demands her gun, ID and badge back.
Magda organizes an intervention for Jinny.
The FBI investigates a serial killer; Jinny goes on a drunken bender.
Magda goes on a biker drug-bust by herself; C.D. and Angela uncover an elaborate plot to kill a diamond broker.
C.D. and Deluca investigate an attempted murder of a former teen criminal; Jinny and Teddy break up when she sleeps with another man.
A female gang member commits murder; Angela is investigated for police brutality.
A reporter is stabbed; Magda goes undercover disguised as a prisoner.
A woman's compulsive gambling leads to her death and her family's financial ruin; Dick's secret snitch is charged with his murder.
A judge sexually harasses Magda; Angela suspects C.D. of covering up information related to Dick's death.
A wealthy man wants to have his unruly teenage daughter declared mentally incompetent.
Jinny and Magda arrest a community leader to protect him from the drug-dealing gangs he is trying to eliminate.
C.D. and Angela investigate the murder of a pizza-parlor owner; Jinny becomes the target of a stalker.
Kate uncovers evidence proving the innocence of a death-row inmate; Jinny and Magda investigate a murder in Chinatown.
Peter's wife threatens Magda; a teenager sets fire to his school; a doctor poisons an elderly patient.
Magda and Peter work as security guards at a gun convention; an officer holds his ex-wife hostage.
A college student appears to have died from alcohol poisoning; Jinny's brother reveals that he is gay.
C.D. and Jinny partner on a rape case.
A city official may be behind a reporter's murder; a drug smuggler swallows 20 bags of heroin; Amanda cheats on her fiance.
An infant boy is left in the back seat of a stolen car; CD and Angela (Tracey Needham, Lela Rochon) investigate a gang connection.
Kate spearheads an investigation of two officers who shoot and kill an unarmed man; Jinny's drinking problem causes her to miss a meeting with a star witness.
C.D. and Angela lock horns over how to proceed with the investigation of a female murder victim with a cell phone found on her body.
Angela beats C.D. at target practice; C.D. spies on her adulterous husband; Magda's sister works at a meth lab; Jinny, Diggs and Ritchie bust a club.
New detective Angela Reid is paired with Det. Candace DeLorenzo in the San Francisco Police Department's Central Station.