| Hahai i nā pilikua nui |
|Season 7, Episode 17|
|Air date||February 17, 2017|
|Written by||Rob Hanning|
|Directed by||Roderick Davis|
Poniu I Ke Aloha
E mālama pono
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 amnesia.
Edward Sears (suicide).
Benton Jones killed by Steve McGarrett.
Steve recieved a phone call from some friends of his at the Phoenix Foundation about Dr Madison Gray on Oahu, this is a reference to fellow CBS Show MacGyver where Jack Dalton called after Madison Gray had been revealed to be in contact with their suspect.
|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.|
|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.|
|Kamekona||Teila Tuli||An associate of the H50 team, and owner of Wailoa Shave Ice|
|Flippa Tupuola||Shawn Mokuahi Garnett||An associate of the H50 team, and cousin of Kamekona Tupuola.|
|Duane "Dog" Chapman||Himself||A real-life bounty hunter, and resident of Hawaii.|
|Sgt. Duke Lukela||Dennis Chun||Sergeant with the Honolulu Police Department.|
|Nahele Huikala||Kekoa Kekumano||A homeless teenager Steve McGarrett looks out for.|
|Alicia Brown||Claire Forlani||FBI profiler|
|Dr. Madison Gray||Elizabeth Röhm||A Psychiatrist, and secret series killer.|
|Pua Kai||Shawn Thomsen||A recruit with Honolulu Police Department.|