Several times in the latter part of the episode the call of a Great Horned Owl is heard. There are no Great Horned owls in Hawai'i. The only owls on the Islands are the native Pueo and the imported and invasive Barn owl. Neither of these two species has a call like the Great Horned Owl.
When Magnum is seen making the big leap in the graveyard, it is very apparently a stunt double.
Although TC's helicopter (N1095A) was shot down and destroyed last week, it is once again seen intact and airworthy.
When Magnum pushes open the gate and it swings back towards him and stops, the squealing sound of the gate continues on even after the gate has stopped moving.