The body of a man who stole $3 million in diamonds is found in the trunk of a car; the condition of the body makes determining the cause of death impossible.

Brenda and Fritz's attention is diverted by problems on the job even though their wedding day has finally arrived, and bad blood between the members of the Priority Homicide Division threatens to cause one of the officers to leave the department.

Once again working with Fritz and the FBI, the team helps get to the bottom of a murder which occurred amidst a drug ring investigation. Also again, Brenda finds FBI feathers ruffled by her unorthodox methods.

Caught in the crossfire of a shootout, two people end up dead and one remains in critical condition. Now Brenda and the team must figure out the the intended crime and the intended victim in order to determine the perpetrator. Brenda and Fritz disagree as they continue to struggle with Charlie, and Provenza drastically alters his lifestyle.

A bank robbery supposedly committed by a known gang of thieves leaves a security guard dead. It also leaves a lot of unanswered questions about the prime suspects and why this latest robbery doesn't fit their regular pattern. Meanwhile, Pope gets some news about his chances at becoming the city's police chief.

Brenda's holiday plans change suddenly when a man is attacked by a knife-wielding assailant who is accidentally run over and killed by the police officer responding to the 911 calls. Brenda & Fritz receive a huge surprise for Christmas from Brenda's parents.

A family works to protect their late minister's reputation from scandal. Meanwhile, most of the Major Crimes Division is subpoenaed, raising suspicions about the one who wasn't.

Brenda can't understand what led to a father's disappearance just as his daughter's single was about to hit the charts making her famous very quickly. Brenda has an opportunity to make her lawsuit disappear by settling with the family that brought it against her but that deal may not be as good as everybody hoped it would.

The murder of a priest puts the squad on a collision course with the Catholic Church and drives a wedge between Brenda and Chief Pope. Meanwhile, Brenda’s parents are in town while her father continues his cancer treatments.