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: 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)
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)
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)
Character mistake: Higgins holds his glass of brandy with Magnum's photos in the other hand and says "I don't know if you're pulling my leg, as you Yanks put it." It's really not an exclusively or typically US expression; in fact it originated in England. (00:27:35)
Character mistake: When Magnum looks at the pictures Higgins gave him, he sees one with a flare that will require him to ask Higgins to do some movie photography magic to remove it. However next to it there's a picture with just a slight less zoom that has no such flare. Magnum for no reason entirely ignores it while he only needed to grab a magnifying glass instead of begging Higgins and wait for the film to be developed again. (00:29:30)
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)
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: In the alley fight, TC runs chasing a bad guy past an upturned cart. He is slowed down by a guy with a hat; when he has his arms around his shoulders, you can see that Roger E. Mosley (or his leaner stunt double) is not wearing a bracelet on his right wrist anymore. (00:39:10)
Continuity mistake: Magnum gets out for a swim after the second sleepless night, carrying just a towel. He has a run-in with the lads, and spends all the time running away from them till Mac fetches him and they get back to the guest house. Magnum is now also wearing his Detroit Tigers cap and brought no towel back. (00:42:15 - 00:43:45)
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: 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)
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: Buck Greene is face to the ship, held at gunpoint. When he turns around in the next shot, his right hand is significantly above the previous position (look at the yellow tag for reference). (01:24:30)
Visible crew/equipment: When Hue and Ki show up at the church looking for Michelle, three of Ki's men walk out of the church in an exterior shot, and the lowered boom microphone pops up into view at the bottom, right corner of the screen. (01:30:10)
Other mistake: In the streets of Little Saigon in the climax with TC and Rick involved, you can spot the same passersby they met with Magnum a couple days before, same clothes and all. (01:30:35)
Other mistake: Colonel Ky fires his gun at Magnum a first time when he is picking up the handkerchief. In the background, a woman in brown is walking peacefully. Cut to scared crowd all over the place. Magnum turns the corner and from the new cover shoots a couple times at Ky. Next shot Ky returns fire, but it's just another take of the first shot; the woman in brown is again walking where she was, and reacts to the gunfight only at that point. (01:30:40)
Revealing mistake: When Magnum shoots the agent in front of Bully's Tattoo Shop, he gets propelled in the air at impossible distance in a very fake trajectory with obvious wirework. (01:31:50)
Continuity mistake: In the close-up of Magnum's hand on the ground, he is looking at Ky and Michelle's feet, but there's no other person lying on the ground, contrary to the rest of the scene. (01:32:20)
Continuity mistake: There's a cut when General Hue flips Magnum on his back; the crowd witnessing the event changes from one shot to the next. (01:33:00)
