When TC's helicopter is in the air, the registration number is N58243, but upon landing on the hotel roof it is N1095A and also has thinner landing skids.
When picking a lock, a lock wrench is needed to rotate and open the door while the pick rakes the pins. Magnum used only a pick when entering a locked room.
The four bodies that are shown as having been in the Ocean for a few days don't look like real bodies would look after being submersed after even just a few days. The bodies look as if they had just recently become deceased, with normal skin tones, and don't look waterlogged at all, nor are they pale as they should be.
TC offers to fly Magnum to the West Shore of O'ahu to help find Rick. They land on a hotel in East Waikik, as evidenced by Diamond Head in the background.
Higgins refers to the Yakuza meeting on the boat as a "little Appalaccia." Actor John Hillerman mispronounced this. What he meant to say was "little Apalachin." This refers to a Mafia summit meeting of the various heads of crime families from across the country (the first of its kind), which took place in 1957 in the rural home of Joseph "Joe the Barber" Barbara, a small town 20 miles west of Binghamton, NY. The FBI had been keeping tabs on all the participants and when they all took a trip to New York state at the same time, it was obvious that something was up. When the mobsters were alerted to the arrival of the FBI, the results were comical. The mobsters scattered in all directions with many of them running off into the woods. This out of the way meeting - on a boat with just a few people instead of in a rural setting - is what made this a "little Apalachin".