McGarrett and Five-0 once again become entangled in the twisted mind games of serial killer Dr. Madison Gray when she stumbles into HPD covered in blood that matches Alicia Brown's and claims she has amnesia.moreless
McGarrett and Danny celebrate Valentine's Day with their girlfriends, while the rest of Five-0 investigates the murder of a man taking a class on how to land women.
Five-0 investigates a murder involving the illegal practice of shark finning and, during the probe, uncovers the possibility that a former Nazi war criminal may be hiding out in an old leper colony in Hawaii.moreless
Five-0 must negotiate between the law and local customs when a man wanted for murder escapes capture and seeks asylum in sovereign land belonging to the Nation of Hawaii.
As Max prepares to say goodbye to his Five-0 family, they must investigate a murder during a police convention on the island.
Danny chaperones Grace's winter formal but terrorists seize the venue and hold everyone hostage in order to kidnap a diplomat's son. Also, Danny and Grover are shocked to learn that Will is Grace's secret boyfriend.moreless
McGarrett and Alicia are kidnapped by the serial killer who has been terrorizing the island after they discover his identity.
FBI profiler Alicia Brown is forced to join McGarrett in the hunt for the chess-piece killer when she finds a body in her bed. Meanwhile, Kono reconnects with a former surfing competitor who is now a disabled and homeless war veteran.moreless
Five-0 works with rogue MI-6 agent Harry Langford to find a terrorist planning to cause nuclear reactors across Europe to melt down. Meanwhile, McGarrett and Danny ask retired FBI profiler Alicia Brown to help them find a serial killer vigilante.moreless
Season 7 begins with the body of a serial killer being found in Five-0 headquarters with an ivory chess piece in his mouth. When a second serial killer is found dead with another chess piece, Five-0 hunts for the vigilante as fear spreads that it's not safe to travel to Hawaii. Meanwhile, McGarrett refuses to take it easy, even though he is recovering from surgery.moreless