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)
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)
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)
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)
Continuity mistake: The opening shot of the intro shows the takeoff two planes with a black nose and USAF written under the wings. When they are in flight later after the control room scene, stock footage is used, because now the planes have "MARINES" written above the wings, followed again by a close-up, this time of a white nosed airplane (or mock-up) with a recognizable number 23 that was absent before. (00:01:30)
Continuity mistake: During the credit sequence, at "Directed by", the pilot undoes the seatbelt. Under the suit, his left wrist reveals the presence of a watch, which is at the right wrist when he gets out of the plane. (00:05:15)
Continuity mistake: When Rick in disguise is in front of an athlete's bungalow and questioning the size of her extra 'chromosome', the fake Press pass on his chest is angled differently between shots. (00:29:00)
Continuity mistake: Higgins is stunning comrade Kalugin with all his blabbing; in the view from Magnum's POV, the two are sitting in an area under direct sunlight, contrary to the rest of the scene. (00:27:50)
Continuity mistake: Magnum is teasing Higgins about the "toys" and sits in front of the Austerlitz model. Higgins holds the statuette in different ways (by the base, or with a finger on top) depending on the camera angle. (00:22:35)
Continuity mistake: Yuri and Magnum are stalking the athletes from their observation spot. When Yuri says "Her English is very good", his right hand is by Magnum's side. Next shot and it's behind Magnum's other shoulder. (00:13:00)
Continuity mistake: Magnum pours a scotch to his aspiring client, tosses in the other room whatever was occupying the chair, and sits down. Yuri Dolgof comes closer to convince him; during this part of the scene, Tom Selleck (or his stand-in) has the arm raised, leaning against the hand to listen, but in the frontal views he just has his arm on the armrest. (00:11:00)
Continuity mistake: The close-up of the battle of Sebastopol - or rather, what Higgins mistakes as such - sees Rick's hand on the sand, by the shell. The hand is not in that position in the other angle. (00:07:40)
Continuity mistake: The MIG pilot is preparing to get out of the plane. There's a close-up of a young and a bit tense soldier (or "soldier", since the extra looks quite unconvincing and not handling the weapon very confidently) wearing glasses. The strap of his weapon is firmly pressed between his fingers and the gun, but in the wider angle the strap is sorta slipping away. (00:05:15)
The Woman on the Beach - S2-E3
Continuity mistake: Magnum and Rick's relative distances seem to be quite off when they are talking to each other from the respective cars; the Ferrari's driver seat seems to be past Rick's in Tom Selleck's close-ups, but when Larry Manetti is talking, he's looking at Selleck's stand-in (sit-in, rather) from a noticeable distance ahead. (00:14:50)