Revealing mistake: The Simon brothers manage to make their escape and Magnum and TC get back to Robin's nest reaching Rick and Higgins. From the open door you can see a single real plant, and a matte painting to act as background. (00:34:15)
Visible crew/equipment: When Rick and AJ return to Harold's hotel suite they join Harold on the balcony, and when Harold keels over onto the floor, the reflections of crew and location set lighting are visible on the glass door. (00:36:45)
Visible crew/equipment: When Magnum returns to the estate he gets out of the Ferrari and runs, then promptly falls when he leaps over the wall, and while Magnum's on the ground the black T-mark is visible on the grass. (00:41:20)
Audio problem: Back to the mansion after meeting Simon & Simon in the hotel room, Magnum narrowly misses the villain. Still clueless about it, runs to Higgins and hops over a wall. The ghastly yell he emits during his athletic effort is entirely off-pitch and at a different volume than his speech. They might as well have used a Wilhelm scream here. (00:41:30)
Continuity mistake: When Magnum jumps over the garden wall, he bumps into rolled up rugs, unfurling one. Which looks the same way at the end of the scene when the same camera angle is used. But the middle part of the scene is shot in a different angle, closer to Tom Selleck's face as he crawls to Higgins and gets up, and in that angle the rugs are piled together in a different way, with the unrolled rug draped over the others. (00:41:35)
Revealing mistake: In the fight against the chauffeur that covers the retreat of Morgan Fairchild, the face of Tom Selleck's stunt double and his thinner moustache are noticeable in several shots - in particular the beginning when they fight close to the camera, and when the bad guy bearhugs Magnum. (00:44:00)
The Eighth Part of the Village - S3-E3
Continuity mistake: Higgins stops Magnum's work telling him that the very special lawn of the estate can't be just mowed. Magnum leans against the mower, held it straight by the left bar, and goes "Gee, Higgins..." In the next shot he is still holding by the left bar, but sideways. (00:04:10)
The Eighth Part of the Village - S3-E3
Continuity mistake: Magnum follows Higgins carrying a wheelbarrow with 3 tool handles sticking out in the front from the sacks. At least at the beginning, because when they emerge from the passageway it's suddenly 4 handles. (00:04:15)
The Eighth Part of the Village - S3-E3
Continuity mistake: When Magnum shows the week-old fortune cookie to a disgusted Higgins, the cookie changes position in his palm in John Hillerman's close-up and when he grabs it - prying the fortune slip from the right side instead of the left where it was in the previous shot. (00:05:25)
The Eighth Part of the Village - S3-E3
Continuity mistake: Magnum is struggling to load the big heavy crate in the van, or make it budge at all. Over half of the crate is in the shadow of the building, but in the rest of the scene when Magnum has to fight the two muscleheads off, it's suddenly fully in the sun. (00:09:30)
The Eighth Part of the Village - S3-E3
Continuity mistake: When the girls come out of the crate, the lid of the crate rests on top of it, sticking out by quite a bit, and parallel. During the fight, when Selleck is replaced by a stunt double, the lid sticks out by a small corner. Earlier when he was trying to talk his way out of it and let the girl go, the shadow of the lid also varied in size depending on the camera angle. (00:10:20)
The Eighth Part of the Village - S3-E3
Audio problem: When Higgins' mail order bride (well, not really) bows deeply for Magnum and her hat falls off, she says "Thank you, Higgins san", but the actress, overwhelmed by her own abundant mane, is just grinning and her lips don't move. (00:11:15)
The Eighth Part of the Village - S3-E3
Continuity mistake: At Rick's place, Magnum reminds him about searching for the yo-yos that hit him at the dock. Meanwhile, he is holding the bar bills in a different way between shots (vertical first, horizontal next). (00:17:55)
The Eighth Part of the Village - S3-E3
Continuity mistake: Magnum and his buddies have gotten all the information they needed from Jansen and Harms, and he begins to fast-talk his way out of the reinforcements. He points a stick at one of them, using his left hand, saying "You owe me 30 bucks." In a cut, the stick switches to the right hand. (00:33:10)
The Eighth Part of the Village - S3-E3
Revealing mistake: When Sato arrives at the estate he exits the car then walks with his two guards towards Higgins, and in the wide shot as Higgins and Sato face each other for the first time, note all the small branches strategically placed on the grass to mark the four actors' proper positions for blocking the shot. (00:41:20)
The Eighth Part of the Village - S3-E3
Continuity mistake: Shooting at the two snipers from the helicopter, Magnum hits one, then in a shot with camera inside the cockpit he asks "Closer TC, closer." In that shot, both the villains are still standing. (00:43:40)
The Eighth Part of the Village - S3-E3
Continuity mistake: In the final climax, Higgins says "Don't" to Sano, pointing a gun. Kim Miyori's head is turned differently (very noticeably) in the different shots. (00:44:10)
The Eighth Part of the Village - S3-E3
Visible crew/equipment: When Sato's car starts driving away he passes Magnum driving with Asani in the back seat, and as the Audi pulls up to the house, the reflections of two plastic T-marks (which are on the ground out of view) are visible on the surface of the car. (00:45:40)
Past Tense - S3-E4
Continuity mistake: When Magnum and the driver are diving away from the explosion, they fall in the grass almost in north-south position, with the hands of Tom Selleck' stunt double on the shoulders of the other guy. In the next shot they are closer and Selleck's face is just above the driver's butt. (00:03:00)
Past Tense - S3-E4
Continuity mistake: When TC's chopper lands in the prison courtyard, its registration mark is N1095A, while when it is shown on the open ocean it is N58243 and it has emergency floats equipped on its skids. (00:07:45 - 00:10:20)