|Pe'epe'e Kanaka (Those Among Us)|
|Season 4, Episode 20|
|Air date||April 25, 2014|
|Written by||John Dove|
|Directed by||Jeff Cadiente|
Ku I Ka Pili Koko
Makani 'Olu a Holo Malie
The investigation of a murdered pool cleaner leads Five-0 to uncover a possible terrorist cell of radicalized students who are plotting an attack on U.S. soil.
- When Kono flips the image from the table computer to the screen McGarrett's right hand is resting on his badge but when the shot changes to the reverse angle his hand moves from his stomach to his badge.
- Michelle Borth is credited, but do not appear.
- Head stunt coordinator Jeff Cadiente directed this episode, and the DVD release Special Features taped his proposal of marriage to his girlfriend, Jaqueline Cryan, casting associate and stunt double on Hawaii Five-0. He had asked her to stand in to go over a scene with Alex, then Jeff took over Alex's spot to propose.
|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.|
|Kamekona Tupuola||Taylor Wily||An associate of the H50 team, and owner of The Shrimp Truck.|
|Sgt. Duke Lukela||Dennis Chun||Sergeant with the Honolulu Police Department.|
|Flippa Tupuola||Shawn Mokuahi Garnett||An associate of the H50 team, and cousin of Kamekona Tupuola.|
|Pua Kai||Shawn Thomsen||A recruit with Honolulu Police Department.|
|Dawn Hatfield||Sasha Pieterse||A college student.|
|Katie Halinan||Eden Riegel||An analyst with the FBI.|
|Kirk Emerson||Bryan Anderson||A man who appears in the episode.|
|Nico Kane||Sam Upton||The main murder victim.|
|Muhammed Nazaria||Salman Bokhari||A man who appears in the episode.|