Professional diver Jay Kahale's corpse was discovered inside the wreckage of downed airliner flight 912 from 1983. The team must seriously look into conspiracy theories about the crash online. Lou and Tani lean on Tim Pollock, a notorious founder of such websites, who points to someone hiding behind a username to fuel conspiracies about the crash and is considered to have published about 80% of it. Quinn is arrested by military police for money-laundering after Steve offered her to join Five-0. After McGarrett confronts Cullen, he latter is killed entering his house having bragged Steve has no idea what he's up against.
—KGF Vissers