Visible crew/equipment: During the fake accident, in the semi-POV shoot with the camera behind the wheel, you can spot roadside the film unit (crew and equipment) that filmed the previous shot, with the car cutting the bike's path. (00:27:00)
Continuity mistake: When Higgins starts yapping about the fascinating case of the homosexual corporals in Wales, Magnum sighs with an arm over the couch's back, changing from the earlier pose between cuts. (00:48:20)
Continuity mistake: At the end of the episode, Joy is laughing when Higgins mentions the various bands; her position on the couch changes rather obviously between shots. (00:48:00)
Audio problem: Magnum screams "SHUT UP!" to Higgins, but actually when John Hillerman is on his back during the mountain climb and mentions Lord Mountbatten, his lips are not moving. (00:38:40)
Revealing mistake: Magnum is carrying up the mountain stairway a Higgins-shaped dummy instead of the real John Hillerman, as obvious by the lifeless bounce of its legs. (00:38:20)
Continuity mistake: The bike falls down diagonal to the road lines, but it's practically parallel in the rest of the scene. (00:27:00)
Continuity mistake: Rick's hand with the remote turns at every cut when he makes the password joke on a depressed Higgins. (00:26:20)
Continuity mistake: When Magnum does his puking act to make his best friend lose a lucrative job, the lady's hair is in front of her shoulder hen the camera is in front of her, windblown away from it when the camera is behind. (00:21:10)
Other mistake: Contrarily to what TC says, the alarm is not 'covered with corrosion', in fact it looks pristine. (00:16:55)
Revealing mistake: Rene cleverly avoids the trap; he turns the wheel to the left, but the car swerves to the right. (00:02:10)
Factual error: Just before the fade-out of the first shot of Robin's limo in France, there are 3 street signs saying "Meyrargues 5 kms", "Marseilles 22 kms", "Aix-en-Provence 6 kms." It's an impossible triangulation; they are almost on a line, Marseilles is about 40 kms south of Aix, which is about 18 kms south of Meyrargues. (00:01:40)
Continuity mistake: The valet brings the Ferrari in front of the club. Digger leans on it with her right hand, dollars in her left hand, but in the next shot the money is on the same hand she is leaning on. (00:07:00)
Continuity mistake: At the club, Rick teases Magnum about not being able to break the ice with Joy Doyle. He has his hand on the fruit juice glass, off it, and on it again. (00:05:05)
Plot hole: After the farcical scene with Rick and TC playing Asian goons, Magnum says in his trademark voiceover; "I know what you're thinking. After the phony beach attack, I should have said goodbye", etc. But the staged attack was in a back alley, in the streets. There are a couple of deleted scenes that pop by in the teaser and never made it to the actual episode, plus an actual beach attack happening later, so it's hard to say what Magnum was referring to, but in the episode as shown, makes no sense. (00:12:50)
Continuity mistake: Higgins is telling Magnum about the poison. Magnum asks, camera on him " Are you sayin' she wasn't kidding." A babe in a light blue bikini walks in the background, right to left. Cut to Higgins responding, which lasts 8 seconds, and the same woman is exactly where we left her walking behind Tom Selleck. (00:36:10)
Continuity mistake: Louise pours coffee from the thermos - still hot overnight. The cup in her right hand has the handle pointed to the left (approx at 11 o'clock). Her sister and Higgins pop up from the door, and now the cup is pointed at 5 o'clock. (00:28:10)
Continuity mistake: Louise praises the "masterful" way Magnum took the yoyos' punches; her hand jumps from one side of Magnum's chest to the other. (00:26:05)
Continuity mistake: At the end of the scene in the freshly painted guest house, Louise undoes a button on Magnum's shirt that has been undone all along. (00:27:20)
Revealing mistake: The moment Magnum hops on the Ferrari ending the brawl on the beach with the two goons in ski masks, parallel to the tire tracks in the sand you can see others from a previous take. (00:23:25)
Continuity mistake: Magnum drives to meet Louise for, he believes, the last time. He's wearing a purple polo shirt, as opposed to the normal views where he dons a dark green one. (00:18:30)