When a series of backyard pool homicides are reported in California, the BAU team searches for an UnSub which has a puzzling past.
The BAU is called to investigate when two members of a conspiracy group in Roswell, N.M., perish in quick succession.
When an anger-driven, unknown subject targets successful businessmen in Detroit, the BAU must investigate.
The BAU investigates three similar crimes in which victims' remains are discovered in old suitcases.
Agent Matt Simmons joins the BAU team in a race to take down Mr. Scratch and save one of their own in the process.
Morgan brings the BAU new information in the case against Mr. Scratch, a serial killer and escaped convict who has been wreaking havoc on the team.
When Reid fears his mother has been abducted, he asks the BAU to investigate while he's stuck in prison.
The BAU investigates when several federal government employees, including a close friend of Walker's, succumb to symptoms of a heart attack Reid anxiously awaits his trial date.
The BAU is called to investigate after three victims are discovered tied to stakes in the brutal Arizona desert.
An international crime boss offers to surrender if he's allowed to return to the United States to watch his daughter walk down the aisle MacGyver and the team crash the wedding to ensure the crime lord doesn't run.
When MacGyver takes Riley and Bozer into the wilderness for survival training, things take a turn when they run into a violent group of criminals Jack and Matty go on a road trip to place Matty's ex-husband and his family in witness protection.
Mac and the gang team up with a master thief to catch an underworld criminal who hired her to steal a dirty bomb.
The head of the Tsunami Warning Center disappears just as the island is being evacuated for a terrible storm.
After a high-speed chase, the team makes a gruesome discovery Chin Ho and his former fiancee awkwardly reunite.
McGarrett discovers new clues in his mother's murder when his sister is kidnapped.
The man who murdered McGarrett's father resurfaces Chin Ho's life is put in danger during a hostage situation.
When the CEO of a successful surf company is murdered, Kono revisits her past Five-0 is thrown into the varied but interconnected worlds of North Shore surfing.
When the daughter of the U.S. ambassador to the Philippines is found dead, the governor tasks Five-0 with finding her abducted sister.
A violent convict escapes from prison and kidnaps a young couple on vacation McGarrett's estranged sister comes to town.
An escalating gang war spills into the stands of a high-school football game, killing several people an unlikely partnership arises.