When a massive fire breaks out in Griffith Park, Priority Homicide is on hand to help. But when an unidentified dead woman's body is found in the center of the scene, Deputy Chief Johnson is doing a lot more investigating then directing traffic. Meanwhile, Brenda and Fritz are living in a small apartment and getting on each other's nerves.

A man wearing a surveillance wire is shot to death at point blank range in downtown Los Angeles; interpersonal relationships on the squad force Brenda into a corner.

Det. Julio Sanchez' little brother Oscar is shot and killed, leaving Julio beside himself with grief and seeking his killer any way he can, which threatens the investigation.

An FBI informant is the prime suspect in the deaths of two Tijuana police officers; Pope, Taylor and Brenda must deal with a public relations mess when a newspaper prints an unflattering story about Priority Homicide.

While investigating the homicide of an entire family, the team once again finds themselves entangled in an FBI case. They also find themselves distracted by an unusually surly Provenza.

Sgt. Gabriel comes under investigation for shooting a homicide suspect when the facts don't add up. The internal investigation gets in the way of the original murder investigation, leaving the entire team tied up in knots.

When a reformed gang member is murdered, the case takes the team back to a familiar neighborhood where they find themselves unwelcomed. Brenda must figure out a way to solve what appears to have been a missed-mark murder and bring peace to an unstable community.

When a man believed to have murdered two young women is found dead in Elysian Fields, evidence points to his victims' families. Brenda and the team must then wade through the suspects to find the true killer.

The conviction of a woman found guilty of poisoning a banker is overturned when a laboratory essential to proving the case comes under scrutiny. The subsequent re-trial forces Brenda to ask Provenza's former partner for help tying up loose ends. Unfortunately for the team, more scrutiny occurs when they all discover Provenza's former partner is no longer the man he used to be. The importance of the case may ruin Brenda and Fritz's planned vacation.