From a CBS press release. Any errors are attributed to the original author(s).
View the stills in the gallery
ON THE EVE OF CHIN HO’S WEDDING, FIVE-0 WORKS A CASE OF A MAN LEFT FOR DEAD IN AN ABANDONED WWII BUNKER, ON “HAWAII FIVE-0,” MONDAY, DEC. 12
Tom Sizemore Returns as Capt. Vincent Fryer
“Alaheo Pau’ole*” – On the eve of Chin Ho’s wedding to Malia, Five-0’s investigation into a man left for dead in an abandoned WWII bunker crosses paths with Capt. Fryer’s case of a Jane Doe, on HAWAII FIVE-0, Monday, Dec. 12 (10:00-11:00 PM, ET/PT) on the CBS Television Network.
*Alaheo Pau’ole is Hawaiian for “Gone Forever”
SERIES REGULARS:
Alex O’Loughlin ………………. Steve McGarrett
Scott Caan ………….. Danny “Danno” Williams
Daniel Dae Kim ………………….. Chin Ho Kelly
Grace Park ……………………… Kono Kalakaua
Masi Oka …………………….. Dr. Max Bergman
Lauren German ……………. Officer Lori Weston
RECURRING CAST:
Terry O’Quinn …………………………. Joe White
Tom Sizemore ……………… Capt. Vincent Fryer
Taylor Wily ………………………….. Kamekona
Reiko Aylesworth ………………. Malia Waincroft
GUEST CAST:
Ian Anthony Dale ………………. Adam Noshimuri
Kala Alexander …………………………….. Kawika
Michael Ng ……………………………… Rafe Tong
Chase Bridgman …………………. Jimmy the Nerd
Pakela Moriwaki ………………………… The Jock
Reyn Mager Aubrey …….. Tulley the Smart Aleck
Jeremy Ratchford ……………………………… Chet
Michael Buie …………………………… Mitch Kolat
Liana Green Wright ……………………………. Tina
Joe Reegan ………………………………….. Shane
Gail O’Grady ……………………….. Sharon Archer
BJ Penn ……………………………… Kapu Member
Kordell Kekoa ………………………………… Priest
WRITTEN BY:
Elwood Reid
DIRECTED BY:
Jeff Thomas

I see the surname Noshimuri again, just like in Episode 2.11. Wonder if they are Wo Fat “loose ends” (trying do reseem or save themselves) or if they are still working with/for him?
Should be interesting to see…..
If he keeps killing his “loose ends” there won’t be a lot of bad guys left for him to work with.