The man sending notes to Rusty on behalf of Philip Stroh turns out to be a dangerous serial killer, causing Rusty to be in more danger with his sting operation than Major Crimes once thought.
A father and his two children are missing from their home, and the team soon suspects that it may be related to marital issues. Meanwhile, Rusty has an urgent question for Provenza.
A man out on parole claims he did not commit the murder that sent him to prison, but he is killed himself soon afterwards. Meanwhile, Sharon has a meeting with Rusty's mother.
Amateur detective "Dick Tracy" returns to help Major Crimes investigate the death of a dog who inherited his deceased millionaire owner's fortune, and Rusty offers to get a job to help his mom.
A woman confesses to murdering her rapist. While some detectives suspect she is lying, Rusty suspects that his mom may be lying to him to get out of rehab.
An elderly married couple, killed execution-style in their home, with their daughter and grandchildren missing, leaves a joint task force to suppose that they may be hostages.
A woman is found dead in a storage container belonging to the actor she was stalking, and Lieutenant Tao works as a consultant for the actor's police drama.
Major Crimes appears to be dealing with a possible sniper while investigating the murder of a man who runs a "revenge porn" website. Meanwhile, Sharon's son voices his opposition to Rusty's adoption.
A young undercover policewoman disappears from a dance club where other young women have vanished. A request from Rusty's mom (in jail) leaves him revolted.
Major Crimes investigates the death of a surrogate mother who promised her recently-born son to three different couples. Meanwhile, Rusty must go through one final hurdle before signing off and making the adoption complete.
A college freshman is killed at a party and his girlfriend is critically injured. The girlfriend's stalker appears to be the killer, but is he the victim of a setup?
A former teen actor is murdered while working on his big comeback movie, and things become awkward between Raydor and Flynn when Flynn's daughter comes for a visit.
When a gang member is killed a few hours after being found not guilty in a murder trial, a gang war threatens to ensue. The accused killer, a rival gang member, is represented by Sharon's ex-husband Jackson.
A man dressed as Santa robs a bank and escapes with the help of a nearby Santa flash mob; however, Major Crimes soon discovers a connection between the two events.
The body of a dead teenage autistic girl is found in the bed of a registered sex offender's truck, but he claims to be innocent. Meanwhile, Rusty is spooked by the latest development in the Stroh case.