It's hard to figure out who actually owns the estate in this episode. At first it seems to be the home (if for only three minutes) of one Ralph Mingo. He's a very rude man, who holds a very awkward birthday party which he makes even more uncomfortable when he proceeds to suffocate to death while opening his presents. (Don't worry, his guests of "con-men, grifters, pimps, and assorted playmates" don't seem to mind.) But after Mingo keels over his two business partners hang around the place for the rest of the show. They might all live (or die) there together. Maybe it's a designated swingers pad, it isn't explained. Anyway, the estate is used heavily throughout this episode, and gets a total of 23 1/2 minutes of airtime.
Byodo-In Temple is seen in a brief still shot, and Makai Research Pier is used to launch a police boat. Sea Life Park is also used, for diving shots and also as a real life location. They actually refer to it as Sea Life Park in the show.
Because the estate is used so much in this episode, it was hard getting down to just these 12 screenshots. But here we go...
Eight years before Thomas Sullivan Magnum, Fred Akamai Loy was living the dream.

The gate house. I'm guessing that's a production vehicle (upper right corner) that they attempted to conceal. I think I remember seeing a truck in that place on Magnum P.I. as well.


The "guest house" is seen in the background here. Shows how small it really is.

"Dead fish, dead man."

This angle was seen in the episode just one week before. Based on the differences in greenery (compare with next screenshot), it seems these two episodes were shot awhile apart, and then for some reason aired one after another.

A screenshot from While You're At It, Bring In The Moon, which aired only a week before.

On the second floor lanai.


At first I wasn't sure, but after some investigation I now believe this is an actual bedroom at the estate (north east corner of the house on a map).

Looking towards the "front door" of "Robin's Nest".

The entrance to this stairway is seen at left in the photo above, and the stairway opens directly onto the second floor lanai. In this picture the viewer is facing away from the courtyard we all know (bottom left, four pictures up).

