Higgins is hit on the head and left bloody after a scuffle with a bad guy. Shortly afterwards, back at Robin's Nest, as he is saying his goodbyes, his head is miraculously healed with no scar or bandage.
When Mrs. Fletcher is talking with Arthur Houston, he is using a computer, hitting a key once in a while as if paging though a document. But the computer isn't turned on - nothing on screen and no lights on the front of the PC/XT or PC/AT case.
When Jessica and Magnum confront the killer in their room, the sound guy is shown in the reflection of the mirror.
In the Magnum crossover episode Novel Connection (1986) leading up to this episode, it showed that Paul Mayfield was shot in the chest. On this episode, it is repeatedly stated that he was shot in the back with the bullet hitting his spine.
When the police chief is explaining the circumstances of the case to Magnum & JB Fletcher, he says that they found two .45 shell casings that match the ones that were in Magnum''s "clip". The chief should have known that a handgun uses a magazine, not a clip.