Continuity mistake: Magnum in the first chase scene passes a device with "cool lights" to the kid in the back seat, but he's not calmed down by it. The car and the pursuing vehicle leap down a hill, and you can see the trunk of the car is a total mess, bulging wildly on the right side. However, it's fine in the rest of the chase. (00:03:05)
Visible crew/equipment: Magnum and TC are hurrying to catch an elevator in the parking garage. As they approach the elevator, you can see a cameraman against the wall on the right side that should not be there. The next shot shows the scene from that cameraman's perspective. (00:39:30)
Plot hole: TC is being held at gunpoint and is told to get in a car in the parking garage and drive. Magnum cannot get a hold of TC on the phone and says that something is wrong. When TC drives off with a gun at his head we see Magnum in the Ferrari, in the parking garage and in pursuit of the car TC is driving. How did Magnum know that TC was being held at gunpoint and that he was in a car in the garage? (00:38:25)
Plot hole: In an effort to keep Glenn's death as quiet as possible, Higgins hires a private pathologist to do an autopsy to see if there were any foreign substances or poisons in his system when he died. A few scenes later it is revealed that Glen was undergoing chemotherapy. How is it possible that the pathologist missed the cancer and the chemo treatment in his investigation? What he found was an excess of antacids.
Factual error: Continuing the crossover with Hawaii Five-0, the CIA is supposedly searching people's homes, holding hostages, threatening to kill them if an SD card is not produced. This is not what the CIA does. They gather intelligence overseas, not domestically. And they are not a law enforcement agency. The FBI handles matter within the US.
Other mistake: Magnum is shown in Captain Greene's office in uniform. He is wearing a US Navy Parachuteist Badge, his SEAL trident, and has the rank of Lieutenant. In the show intro section, he is always shown wearing just the trident, and has the rank of Lieutenant Commander. Was he demoted? (00:03:15)
Continuity mistake: Magnum and Higgins are traveling in the Ferrari going home. Magnum's wristwatch says it is 9:35. They go home, Magnum gets arrested by the Secret Service, is taken for an interrogation, is taken to a house where they find some counterfeit money and two bodies. Magnum is released and stays at the house with HPD, and then he and Higgins go back to the car and they leave. According to Magnum's wristwatch, only ten minutes have elapsed. (00:09:00)
Continuity mistake: In one scene a police car (number 412) is T-boned in the right rear quadrant. A spin shot of the car shows that quadrant dented and scraped. In a later scene the same police car driven by TC makes a left turn. There are no dents or scratches on the car. (00:33:00 - 00:34:15)