Hōlapu ke ahi, koe iho ka lehu (The Fire Blazed Up, Then Only Ashes Were Left)
Adam's mission to take down organized crime on the Island goes sideways when deadly chlorine gas he was using to bait a big fish falls into the wrong hands. Also, Adam begins to doubt Jessie's allegiance.
Episodes
21
Ahuwale ka nane huna (The Answer to the Riddle Is Seen) 43
Harry Langford enlists McGarrett and Danny’s help to track down Lady Sophie, a teenage British royal who has run away while under his protection. Also, Grover, Tani and Junior work a 25-year-old murder case after a mysterious Betamax tape arrives at 5-0 headquarters.
22
Kopi wale no i ka iʻa a ‘eu no ka ilo (Though the Fish Is Well Salted, the Maggots Crawl.) 42
Harry Five-0 must help Duke after he is forced to steal crucial evidence from the police locker in exchange for his kidnapped granddaughter. Also, Jerry goes undercover at a mental health facility in order to solve a murder.
23
Ka Hana a ka makua, o ka hana no ia a keiki (What Parents Do, Children Will Do) 42
McGarrett and Five-0 take on the mob when a former boss is killed and Junior’s friend Cammy Lin is on the run after witnessing the hit.
24
Ka lala kaukonakona haki ʻole I ka pa a ka makani Kona (The Tough Branch That Does Not Break in the Kona Gale) 43
McGarrett joins Junior and his SEAL Team on a high risk covert mission to capture an elusive target who is holding his mentor, Joe White, hostage. Also, Gerard Hirsch and Kamekona help Grover and Tani on a murder case involving masterpieces stolen by the Nazis during WWII and Tani makes a shocking discovery.
25
Waiho wale kahiko (Ancients Exposed) 43
McGarrett and Five-0 discover a Russian spy ring hiding in plain sight on Oahu when a Russian nuclear attack submarine appears on the coast of Waikiki. Also, Tani is conflicted by her unnerving discovery at Adam’s house.
