Brenda finds herself at odds with the FBI in a struggle to gain control of the murder investigation of a well-known businessman. Deciding to work in tandem, Brenda finds herself working directly with Fritz, who was assigned to the case. After discovering that the FBI has ulterior motives in the investigation, Brenda's relationship with Fritz is put under further strain.

When the drowned bodies of a mother and daughter are found by fishermen, Brenda and the team must determine if the apparent suicides are more than that. Following a strange coil of discoveries, the most surprising revelation that surfaces is one about the killer.

Leaving the scene of an accident to get to a multiple homicide scene, Brenda finds herself unable to drive the streets of L.A. which she worked so hard to learn. Once she gets to the crime scene, she and the PHD are faced with another challenge: the murdered bodies are nowhere to be found. In order to solve this case, they must first search for the victims before they can hunt for the killer.

It looks to be the return of a serial killer when two bodies turn up dead. With the knowledge that he kills in sets of three, Chief Pope charges Brenda and her squad to hunt down the killer before the third victim is taken.

Brenda suspects something more than suicide when a high-school girl is found hanged in her bedroom; the investigation uncovers a ruthless sexual game being played at a private school.

Brenda goes toe to toe with the tricky attorney of a man suspected of a brutal rape and murder. Going a few rounds to get to the truth, Brenda dukes it out with the lawyer who is just as clever in the ring as she is. Can she hang in there and get to the truth before the final bell?

Brenda and the team are called in to investigate the questionable disappearance of a shady financial investor. The team is a mess with Daniels now in another division, Gabriel doing double duty, and Provenza with behavior more curious than usual. In the meantime, Brenda and Fritz deal with a sick Kitty.

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.

Brenda must reopen the case of a murdered psychiatrist when the man claiming to have committed the crime gives a statement that doesn't quite match the actual events. Based on evidence of the man's acquaintance with the doctor, Brenda believes there is a cover-up and sets out to unearth the truth. Willie Rae throws a roadblock in her path when she pops in for a visit, which actually appears to be an attempt to dump Brenda's handful of a niece onto the newlyweds during for the duration of summer break.

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.

After a man is murdered while taking pictures of the stars from his balcony, the squad suspects the crime is somehow connected to the woman with whom he was having an affair. But their investigation is hindered by a missing murder weapon, as well as the difficult adjustment of moving into a new office.

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.

Tao's son works at a camp where a boy goes missing.

Fred Willard (Modern Family) guest stars as Santa Jack, the owner of a Christmas village who believes he could be the real Father Christmas.