Revealing mistake: To make his escape from the church, Magnum turns the Mercedes around. You can distinctly see at the driver's seat the driver, which is not Tom Selleck but someone who seems to be wearing fake moustache. (01:10:50)
Continuity mistake: Ky is leaning against the church wall motioning Magnum and Lady Hue to move. In the two shots, his shadow shifted noticeably. (01:10:15)
Continuity mistake: When Magnum's wife is praying in the chapel, the Virgin Mary statue bare casts a shadow on the right part of the corner in close-up, while in wider angle casts a large shadow on the whole arch. (00:47:40)
Continuity mistake: In the crowd at Little Saigon, the same extras can be seen appearing multiple times. A particularly obvious one when TC surprises Magnum and stretches his arm trying to stop him from walking away. Right in front of them, there's an old woman with a younger female in a black shirt with a diagonal stripe. Several seconds pass and those two are in the little crowd that witness Rick and Thomas fighting over the kid. (00:34:50)
Continuity mistake: Magnum shows the picture to the old lady in the street by holding it from the top corner in the first shot, the bottom in close-up. (00:33:50)
Other mistake: Magnum and his bride seek shelter under table during the bombardment; if it happened the way it is shown, with a model completely torn to pieces, and with flames in frame during the first table shot, they would surely not be able to stay there, nor would have taken refuge there to begin with - if the roof did not kill them already falling on them. (00:25:10)
Other mistake: The US delegation pops from behind some trees with military copters that are explicitly presented as deafeningly noisy; it's just silly and internally contradictory. Even if we forget how underplayed helicopter noise often is in Hollywood, here we go from zero to thunderous in a split second. (00:21:40)
Continuity mistake: When Gen. Hu is teasing Col. Ky about his need to justify his lack of results, the shadow cast on his chest changes heavily with the camera angle. (00:21:15)
Continuity mistake: When TC and Magnum have the conversation on the beach, extras are constantly recycled; obvious example is the girl with a bandanna and a red bikini, appearing behind both too. (00:17:30)
Continuity mistake: Rick checks out of the photo Magnum hands him. In the background, cards are scattered on the table. The next time we see the table a couple cuts later, the two of hearts changed position, now being on top of the scattered cards, and it is in yet another position during TC's close-up. (00:14:35)
Deliberate mistake: Magnum spots the fateful brunette on the yacht. During this scene, a couple times he sees her with the exact angle of the camera zoom when he just pulled away from it. (00:11:00)
Continuity mistake: After being negligent with his paying customer tossing the evidence in the ocean, Magnum is taking pictures of a ship. From behind, he's taking pics with both hands on the camera, from the front, he's handling it with just the right one. (00:10:25)
Continuity mistake: Asking for camera film was a bit much, so Magnum skedaddles with a cheeky grin before the lads chew him off. As he makes his exit, he is holding the bag in a different way, with the strap across instead of straight. (00:08:10)
