|Pale'la (Buried Secrets)|
|Season 4, Episode 15|
|Air date||February 28th, 2014|
|Written by||Moira Kirkland|
|Directed by||Jerry Levine|
Na Hala a ka makua
While Five-0 investigates the murder of a real estate agent whose body was found in the walls of one of his listings, Danny is thrown when his mother comes to Oahu with shocking news.
Five-0 investigate the murder of estate agent Guy Ingram, whose mumified remains were found behind the wall of one of the houses he was selling. Ballistics match a weapon used previously that was supposedly confiscated and destroyed. They then realise that one of the employees of the smelter, George Moku, is selling those guns.
He admits to selling the gun to Gerard Burns, a defense attourney who admits to killing Ingram and Burns' wife after learning they had an affair and planned to runaway. The remains of Burns's wife who went missing a few months previously are later discovered behind the wall of a house.
Meanwhile, reporter Shawn Hutten presses Grover about his past in Chicago. Grover finally confesses to McGarrett about the real reason why he moved to Hawaii: Grover previously worked an intense hostage situation involving a suicidal young father but despite Grover's efforts, the man wound up killing himself and his young son as well.
Danny's mother Clara Williams pays a visit and has some shocking news for her son: she's divorcing his father.
- Clara Williams, Danny's mother is introduced for the first time.
- In a deleted scene, Steve talkes about his best friend Freddie Hart and how his death still affects him when he attends an anonymous group for military who suffer from PTSD.
- Michelle Borth is credited, but do not appear.
- Melanie Griffith first in this episode.
- Daryl Hannah made her guest appearance in this episode.
|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.|
|Clara Williams||Melanie Griffith||Danny Williams's Mother|
|Grace Williams||Teilor Grubbs||Danny Williams's daughter and first born child.|
|Sgt. Duke Lukela||Dennis Chun||Sergeant with the Honolulu Police Department.|
|Cherie Tranton||Daryl Hannah||A woman who appears in the episode.|
|Shawn Hutten||Ethan Embry||A man who appears in the episode.|
|George Moku||Eugene Cordero||A man who appears in the episode.|
|Akoni Sakata||Duke Kimhan||A man who appears in the episode.|
|Inoa Sakata||Jennifer Say Gan||A woman who appears in the episode.|
|Jimmy Chan||Bayani Ison||A man who appears in the episode.|
|Gerard Burns||Michael Green||The Killer|