Guest-star Dane Cook plays younger brother to Scott Caan. In real life, Caan is the younger one by several years.
Clyde Kusatsu who plays Judge Kamalei also appeared in the original Hawaii Five-O. He played Jerry Quan in Season Nine's "Yes, My Deadly Daughter" (1976)
"Loa Aloha" is Hawaiian for The Long Goodbye
Character dialogue establishes that Danny has now been in Hawaii for a year, within the story universe. In the pilot episode, 18 episodes earlier, it was established in that he was in Hawaii for 6 months so far.