The book that Kumu places on the bookshelf behind Higgins is title Pahonu which is the real name of the estate from the original series.
The fictional Ko'uka Elementary School which is shown to be across a grass field/parking area from the Bishop Museum is actually the Richard T. Mamiya Science Adventure Center which is part of the Bishop Museum.
In this episode, during his voice over, Jay Fernandez's Magnum says, "I know what you're thinking." Tom Selleck's Magnum said that frequently. In fact, Selleck says it on a TV commercial concerning reverse mortgages.
Continuing the Hawaii 5-0 connections in the first two episodes, Catherine Haena Kim appeared twice in that series as Nani Kalakaua.