Other mistake: Magnum is taunting the dobermanns while he's grabbed and pushed against the door by two dudes. They are big, and armed. The room is normally lit. There is just no way he could get inside and somehow Miss their presence. Especially the one coming at him from his right; there is a railing on that side of the landing. Magnum would have literally bumped into him; it's not that because he was out of frame he was not existing. (00:05:15)
Other mistake: When the lads chase Magnum at the beginning, first of all they take a disproportionate amount of time to reach him, and secondly, the same footage is reused, so they effectively sprint past the same tree (with the same 2 dead leaves and straw by it) twice. (00:04:40 - 00:05:05)
Thank Heaven for Little Girls and Big Ones Too - S1-E4
Other mistake: Magnum gets inside the Waikiki Natatorium War Memorial climbing athletically over the closed gate. The bad guy comes roughly from the same direction, but given his physical state, one wonders how could he accomplish such a feat - it is conveniently kept off camera, but he comes from a direction with no gates. To beat him to the finish, Rick picks another direction entirely just walking around the bleachers! And they all end up at the same location.
Don't Eat the Snow in Hawaii - S1-E1
Other mistake: For the cool shot when Magnum smiles at the camera and then drives off (which will be used in the opening of the show for its whole run), Magnum unclips the detachable roof of Robin's 308 GTS and gives it a good push back. But it's not a retractable roof that folds in, but a Targa hard-top. So, basically Magnum just dumped a piece of Robin Master's fancy car in a random lawn somewhere near his estate, maybe even denting the rear of the car in the process as he carelessly shoved it back. That's inconsiderate even for Magnum's low standards. (00:06:10)
The Arrow That Is Not Aimed - S3-E13
Other mistake: Magnum mispronounces the word 'seppuku' calling it it 'seppuki', prompting Higgins to correct him. He plays the role of the usual Westerner who is unfamiliar with the word and concept. But in the previous season, in 2-9, "The Taking of Dick McWilliams", not only he already had to deal with the prospect of ritual suicide, but he spontaneously mentioned the word himself ("Seppuku? You're willing to let your daughter kill herself?") with the other person simply mentioning a vague 'honorable thing to do'.
Almost Home - S3-E10
Other mistake: When Magnum passes a can of nondescript soda to Bridget outside of the Navy building after the chat with Maggie, the vending machine has a big triangle of masking tape to conceal the Coca Cola logo for sponsorship reasons - however the production failed to cover the Sprite button which remains recognizable. (00:13:00)
Other mistake: The clock in the millionaire's limo has all hands (including the second hand) perfectly still. (00:02:00)
