|Season 2, Episode 19|
|Air date||March 19, 2012|
Hawaii Five-0 come to Mary's aid when she reveals that she's being forced to smuggle blood diamonds to save the life of fellow fight attendant and friend, Angela.
Steve McGarret's sister arrives Mary McGarrett in Hawaii where she meets her brother and Danny Williams on the beach with the two who have been surfing getting a huge surprise at Mary's appearance and even so when Mary reveals that she's a flight attendant.
When Mary returns to her hotel room, she meets Jordan Nevins who reveals that Mary's colleague and friend, Angela Branson is being held prisoner with Nevins forcing Mary to smuggle $20 million worth of conflict diamonds to New York, or else Angela will die.
Despite her efforts, Mary is eventually and caught, leading the Hawaii Five-0 Task Force to get involved. As such, they've got nine hours to save Angela.
The team investigate and discover that the confiscated diamonds were taken by Daryl Kaleo, the brother of disgraced Honolulu Police Department detective, Detective Kaleo and who Danny put away for murdering Danny's partner the previous year.
Hawaii Five-0 and Captain Vince Fryer later team up with Danny and Fryer visiting Detective Kaleo's cell in which the two confront the disgraced Detective with Detective Kaleo denying that he's involved with his brother although Detective Kaleo later crosses the line by asking about Grace Williams, Danny's daughter.
Fryer eventually finds a cell phone in Detective Kaleo's bed with Kaleo stating that it could have been planted there which doesn't leave Fryer and Danny convinced.
As they leave, Danny threatens Detective Kaleo, stating that if Kaleo mentions Danny's daughter again, then Danny will kill Kaleo.
The team soon bring in August March who originally served a thirty year sentence for diamond smuggling and they soon find Nevins with Nevins claiming that Angela organized her own kidnapping in the hope of getting Mary to play along.
Despite the team's efforts, Angela isn't found while Mary is eventually allowed to return to work.
At the harbor, Angela emerges and sells the diamond to March but in a surprise twist, March who's the mastermind produces a gun and shoots Angela dead with Angela falling into the harbor while March heads off into the night.
- The team celebrate Steve McGarrett's birthday.
- Alex O'Loughlin / Steve McGarrett's cake was actually spiked with salt, unbeknown to him.
- Edward Asner played August March, he originally played over 36 years ago on the original Hawaii Five-O.
- The season 2 box set gag reel shows that a prank was played on Alex O'Loughlin during the birthday cake scene: a makeup person distracted him while Grace Park sprinkled salt on the piece of cake that he was about to eat on camera.
|Lieutenant Commander |
|Alex O'Loughlin||A Navy SEAL and the leader of the Hawaii Five-0 Task Force for Governor Sam Denning.|
|Detective 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.|
|Officer Kono Kalakaua||Grace Park||Youngest member of the Hawaii Five-0 Task Force, and Chin's cousin.|
|Dr. Max Bergman||Masi Oka||Chief Medical Examiner for the Hawaii Five-0 team.|
|Captain Vince Fryer||Tom Sizemore||The HPD Chief of Detectives.|
|Detective Kaleo||Jason Scott Lee||A corrupt Detective who murdered Danny's partner, Detective Meka Hanamoa.|
|Mary McGarrett||Taryn Manning||Steve McGarrett's little sister.|
|August March||Ed Asner||A criminal the team call on for help.|
|Daryl Kaleo||Anthony Brandon Wong||Detective Kaleo's brother.|
|Jordan Nevins||Tony Todd||A suspect.|
|Angela Branson||Rebecca Ocampo||Mary's colleague.|
|Ha'i'ole ♦ Ua Lawe Wale ♦ Kame'e ♦ Mea Makamae ♦ Ma'eme'e ♦ Ka Hakaka Maika'i ♦ Ka Iwi Kapu ♦ Lapa'au ♦ Ike Maka ♦ Kil'ilua ♦ Pahele ♦ Alaheo Pau'ole ♦ Ka Ho' Oponopono ♦ Pu'olo ♦ Mai Ka Wa Kahiko ♦ I Helu Pu ♦ Kupale ♦ Leki ♦ Kalele ♦ Ha'alele ♦ Pa Make Loa ♦ Touch of Death ♦ Ua Hopu ♦ Ua Hala|