First appearance of HPD Sgt. Duke Lukela in the remake series. Dennis Chun did make appearances in the original Hawaii Five-O alongside his real-life father (Kam Fong - who was the original Chin Ho Kelly c. 1968-1978) and the unaired 1997 pilot.
There is a reference to a case that Chin Ho worked on prior to his termination from the Honolulu Police Department involving the asset forfeiture locker where seized money totaling $28 million from major narcotics cases are held. Chin revealed the background of his HPD past where he was working on the case and some of the seized drug money (around $200,000) was reported missing which prompted the false allegations that he was receiving payoffs and being falsely accused of theft. It was the case that he was working on which he cannot drop the charges.