The LAPD finds itself in a precarious situation during an investigation into the disappearances of a string of young girls from a popular nightclub, leading to a turf battle between The Major Crimes division and the Special Operations Bureau. Fritz Howard remains on the mend from poor health, while Rusty’s mom continues to struggle with the law and her sobriety.

The Major Crimes division works to stop a serial killer who has been targeting female sex workers; Captain Raydor seeks the help of a consultant; Stroh gets closer to achieving his deal.

The shooting deaths of an elderly couple in their home prompts the team to join forces with the Special Operations Bureau to track down a deadly predator prowling Los Angeles and taking hostages along the way.

After finding a young runaway murdered and thrown in a trashcan, the Major Crimes unit is led on a long, puzzling hunt to find the deceased girl's killer and her identity. Meanwhile Raydor consults her husband about a big proposition she has for Rusty.

The unit runs into difficulty when it comes to identifying a suspect after two individuals are attacked with scissors at a high school party; Provenza meets a woman who has an unusually powerful and immediate impact on him.

There is a miscarriage of justice when a gang banger is acquitted of murder and released from custody. Sharon’s ex-husband, Jack Raydor represents the suspect in a subsequent murder. Rusty takes a chance when the guy he has a crush on visits the station.

Flynn tries to talk a man down who is standing on the ledge of a bridge. But he soon discovers that the man is in fact a sex offender who has a dead body in his car. Rusty prepares a impact statement to try and end his involvement in the Stroh case.

The Major Crimes division faces a new challenge as they work to solve the murder of a dog that was left a 20 million dollar estate by his deceased owner. With the help of wannabe detective Jonathan Baird, aka Dick Tracy, the case takes a new turn as the squad begins to suspect foul play in the death of the dog's owner, a wealthy heiress.

Shortly after being released from prison, a man who proclaimed his innocence is found murdered. The victim's case is reopened and the squad works hard to solve a seventeen-year old murder. To the surprise of Raydor, Rusty confesses the reason behind his recent suspicious activity.

Lt. Mike Tao of Major Crimes finds himself doing double duty when the star of the cop show on which he moonlights as a consultant becomes the prime suspect in the murder of his biggest fan.

The caregiver of Sanchez's mother is found murdered. Rusty takes on Jack when he turns up at Sharon's condo acting recklessly.

Santa finds himself on the naughty list after robbing a bank, but a Santa flash mob complicates his apprehension and the Major Crimes unit scrambles to figure out how things went so wrong. Sharon’s kids come to town for the holidays while Buzz starts training as a back-up police officer.

A Hollywood comeback is interrupted when a former child star is found dead on skid row, leaving the director of the actor’s current movie and his manager as prime suspects. Flynn’s daughter comes to visit and the true nature of Sharon and Flynn’s relationship comes to light.

The violent murder of an alleged rapist gives the squad the emotional task of questioning possible suspects. Meanwhile, Rusty begins to question his mother’s motives as he catches her in a lie.

When a father and his two young children go missing, the squad has to work quickly to find them, while uncovering a slew of terrible family secrets along the way. Meanwhile, Raydor does her best to trust Rusty as he begins to take suspicious trips out on his own.

A murder committed in a hotel room is investigated and results in some potential international repercussions. Rusty thinks about how to share a huge secret with the rest of the squad.

The mysterious murder of a tech-entrepreneur with questionable morals and possible mob connections has the Major Crimes division working overtime. Meanwhile, Rusty struggles to feel accepted when Raydor's son Ricky comes home to visit and Fritz Howard prepares to assume command of the LAPD's Special Operations Bureau.

Phillip Stroh returns, demanding a new deal from DDA Rios in exchange for his cooperation; Major Crimes races to prevent the deaths of three women while trying to decode the source of Stroh's information.

A surrogate adoption gets complicated, leaving one person dead and a lot of people searching for answers. The Major Crimes division gets their hands dirty as they explore LA's underground water system. Sharon works to make Rusty officially part of her family, while he struggles to tell his biological mother about the upcoming adoption.