The BAU team heads to Portland, Ore., to investigate a chilling abduction that may be linked to a local couple who were killed in their home a week earlier.
Prentiss faces her past when the BAU is sent to investigate the murders of prominent businessmen, all of whom are missing their hearts Prentiss plans a romantic first date with Mendoza, but the evening is cut short by an urgent call from Rossi.
A professor from Lewis' past tips off the BAU to an alarming number of overdose deaths of patients who just completed rehab.
The BAU investigates a double homicide and kidnapping in New Hampshire Rossi's plans to elevate his relationship with Krystall don't go as planned.
Mac, Desi and Russ go under cover during a royal Indian wedding to protect a princess whose policies could put her life in danger Bozer suspects Riley is up to her old hacking ways.
Mac and Riley head overseas together to prevent a governmental collapse and inadvertently inhale new, deadly microscopic technology.
While on a mission to hunt down a Codex lead, Mac and the team discover Murdoc hacked their comms and has recorded them for months.
When Mac and the team are unable to prevent sensitive intel from falling into Codex's hands, Mac must scale a vertical cliff using only gear he can cobble together himself to prevent the info's transmission.
When McGarrett finally gets to Wo Fat, he is stunned to learn that the Japanese Yakuza wants them both dead.
When a suspect threatens to release a deadly virus, the Five-0 teams up with Special Agents G. Callen (Chris O'Donnell) and Sam Hanna (LL Cool J).
Max reveals shocking information about his childhood to help the team track a serial killer who may have ties to Max's past.
When Danno and his family are targeted by a vengeful dirty cop from Danno's past, the team steps in to help.
Chin Ho shares news about Joe White that rocks McGarrett to his core Danny is forced to play midwife when his ex goes into early labor.
When a teenager is murdered, the team must determine why she was targeted and if the person responsible was a hired professional.
On the night before Chin Ho's wedding, the team's investigation into a man left to die in an abandoned bunker intersects with Capt. Fryer's case.
McGarrett and the team search for a missing bus full of school children and those responsible for the crime.
McGarrett travels to North Korea with Jenna Kaye to deliver ransom to rebels holding her fiance hostage the team investigates the murder of an investigative reporter who appears to have connections to Jenna.
The physically altered corpse of an unidentified man is found in the trunk of a stolen car Danno crashes on McGarrett's couch.
The murder of a bride on her wedding day leads the team to a strip club.
The team protects a witness who is on her way to testify against a dangerous drug cartel -- while the cartel is in hot pursuit.