| Waiwai |
|Season 6, Episode 17|
|Air date||March 11, 2016|
|Written by||Eric Guggenheim|
|Directed by||Maja Vrvilo|
Ka Pohaku Kihi Pa'a
McGarrett and Five-0 must track down a Russian spy who has stolen a flash drive containing classified NSA information that puts the life of a member of their Ohana at risk. Also, McGarrett finally learns why Catherine left him, and Abby continues to conceal her actual mission from Chin.
- Steve McGarrett killed 1 person.
- Three civilians died.
|Steve McGarrett||Alex O'Loughlin||A former Navy SEAL and the leader of the Hawaii Five-0 Task Force.|
|Danny Williams||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, and Kono's cousin.|
|Kono Kalakaua||Grace Park||Youngest member of Hawaii Five-0, and who is Chin's cousin.|
|Dr. Max Bergman||Masi Oka||Chief Medical Examiner for the Hawaii Five-0 team.|
|Jerry Ortega||Jorge Garcia||A conspiracy expert and an associate of the H50 team.|
|Lou Grover||Chi McBride||Former leader of the HPD SWAT, and newest member of H50.|
|Duke Lukela||Dennis Chun||A Sergeant with the Honolulu Police Department who regularly assists H50.|
|Abby Dunn||Julie Benz||Inspector Abby Dunn words for IA and is in a romantic relationship with Chin Ho Kelly|
|Chris Dalton||Michael McMillian||A man who appears in the episode.|
|Elliot Brenner||Derek Webster||A man who appears in the episode.|
|Andre Weller||Regan Downie||Paramedic|
|Ingo Rademacher||Robert Coughlin||Appeared in the Episode|
|Olga Fonda||Anna Novick||Secret Russian assassin|
|Jimmy Borges||David Yang||Appeared in the Episode|