|Season 4, Episode 11|
|Air date||December 20th, 2013|
|Written by||Bill Haynes|
|Directed by||Bryan Spicer|
O kela me keia manawa
Hawaii Five-0 are left stunned when a murder investigation turns up evidence suggesting that the person behind the crime may be a serial killer which puts one of the team in great danger. Meanwhile, Danny and Grace find a mysterious puzzle box washed up on the shores of Oahu.
Five-0 investigate the murder of a serial burglar, later identified as Victor Dobbs by Kamekona, at the trunk of a car. They find a laptop at his residence containing a list of all the homes Dobbs burgled. As Catherine and Chin search the houses, Five-0 receive a visit from the FBI, who informs them that the murderer is a serial killer who killed at least 14 women after imprisoning them for 24 hours. Chin finds the house where Dobbs was killed, only to be held captive by the owner, Gary Nathan, the serial killer, who later kidnaps his girlfriend when she makes an unexpected visit.
While Nathan is distracted, Chin manages to break himself free and kill him. Meanwhile, Danny and Grace find a puzzle box washed up on the beach, from Japan after the 2011 tsunami, with a locket and a girl's face in it. The girl is found to have died during the earthquake.
Danny and Grace then travel to a temporary housing shelter in Ishinomaki, Japan to return the box to the family's only survivor. Kono's trail to Adam leads her to Vancouver, British Columbia.
- Emily: (Revives, and realizes Gary is tying her up) Gary, what are you doing?
- Gary Nathan: It's not you. It's me.
|Alex O'Loughlin||A Navy SEAL and leader of the Hawaii Five-0 Task Force.|
|Scott Caan||2nd-in-command of the Hawaii Five-0 Task Force and Steve's partner.|
Chin Ho Kelly
|Daniel Dae Kim||A member of the Hawaii Five-0 Task Force.|
|Grace Park||Youngest member of the Hawaii Five-0 Task Force, and cousin of Chin.|
|Dr. Max Bergman||Masi Oka||Chief Medical Examiner for the Hawaii Five-0 team.|
|Catherine Rollins||Michelle Borth||An Ex-Navy Lieutenant and Steve's on-off girlfriend.|
|Lou Grover||Chi McBride||Captain of the HPD SWAT team.|
|Samantha Grover||Paige Hurd||Lou Grover's oldest child and daughter|
|Grace Williams||Teilor Grubbs||Danny Williams's daughter and first born child.|
|Kamekona Tupuola||Taylor Wily||An associate of the H50 team, and owner of The Shrimp Truck.|
|Dr. Charles Fong||Brian Yang||Forensic Scientist who works for the HPD and H50.|
|Leilani||Lindsay Price||Chin's girlfriend.|
|Gary Nathan||James Urbaniak||The serial killer.|
|Agent Rebecca Conway||Monique Gabriela Curnen||An agent with the FBI.|