Continuity mistake: Higgins mocks "Tommy", who in close-up rips the page of the notepad where he scribbled down the partial license plate. In a wider angle a few seconds later into the verbal exchanges he rips the page again. (00:18:05)
Continuity mistake: Magnum sits on the couch's arm, by one of the sisters who is holding Higgins' book in her lap. On her lap, under the book, there's the handkerchief she used when she was having tea. In the closer angle, there's no hankie, while Madge's is open wider. (00:18:20)
Character mistake: Magnum is holding a stinky pickled egg while he bickers with his friends in Rick's car. TC calls the store chain Magnum has been hired to protect "Day-N-Night" instead of "Day-N-Dark." (00:22:00)
Revealing mistake: Magnum goes through his collection of Topps baseball cards; the fake one with Johnny Wells has a design that sticks out from the others - it is in a fact a 1969 Bernie Allen one with a little post-it sticker on it with a different name. (00:25:25)
Visible crew/equipment: At the bingo fundraising event, in the shot from behind TC as he hands someone a few bingo cards, as the camera moves backward two white tape marks are visible on the grass. (00:30:45)
Other mistake: Magnum rewinds the answering machine tape hitting the opportune button just once, and it plays on its own the exact bit he needs to listen to, without any intervention on his part. (00:36:20)
Character mistake: Higgins remembers having met the sisters "37 years ago this July", and shows a "theatre program from Blackpool the summer I completed my upper second at Sandhurst." Considering the episode is set in 1983, Higgins would have still been in military academy in WW2, which contradicts the plethora of experiences in North Africa and Burma. It's more likely that John Hillerman misspoke and it was meant to be "47 years ago", before the war. (00:37:30)
Visible crew/equipment: Magnum stops in front of the bar building on the beach of the King Kamehameha club asking his friends about his odds. They laugh him off, of course. In Tom Selleck's close-ups you can spot in the sunglasses TC's reflection far in distance with his yellow polo, but there's a man standing much closer that shouldn't be there. (00:04:10)
Revealing mistake: In the prolonged close-up of the London Chronicle it's easy to spot the same two paragraphs repeated over and over in the main article. Someone at the prop department was particularly lazy - although they did put in some pretty funny gag, because at the very bottom you can see an ad for "500,000 slaves at 1£ each." Pretty sure that was not allowed on British newspapers in 1983. (00:05:45)
Continuity mistake: Higgins outside the British shop is stammering. He says "But I..." and a blonde with sunglasses and a hair clip quickly walks behind him - nobody was walking towards them from that direction in the establishing shot. When a wider angle is again presented, there she is; that woman is approaching from that same direction. (00:07:15)
Audio problem: The woman Higgins seems to have developed an insta-crush on is dragged by two guys in an alley. She is protesting with rather high-pitched shouts but her lips do not move. (00:07:50)
Continuity mistake: Magnum approaches Vivian and Higgins' table carrying an oar; during this wide shot the table has direct sunlight all over, but in other camera angles they are in the shade. (00:10:55)
Revealing mistake: Higgins puts on the table the newspaper clipping with the picture of Lady Wilkerson. The text underneath it speaks of a generic conference, and it's simple filler text he had no reason to keep. (00:15:45)
Continuity mistake: Magnum speaks to Higgins in the study after the romantic dinner mix-up. The collar of his jacket is straight all the way up in wide shots, and loose in Tom Selleck's close-ups. (00:27:40)
Revealing mistake: When the kidnappers drive-by ending up hitting with the car door, John Hillerman is replaced by a stunt double with hilariously fake moustaches, and Magnum is not Tom Selleck. (00:29:00)
Continuity mistake: Magnum asks Higgins "In the meantime, you're just gonna sit there sipping brandy, being terribly British?" Higgins answers "Yes!", cut to Magnum, hands crossed, then cut to Higgins finishing his glass, and then, all of a sudden and with the clock ticking all the way through in continuity, Magnum too is sitting there with a glass of brandy in hand. (00:31:35)
Revealing mistake: A younger and more athletic stunt double for Higgins is visible in several shots of the climactic fight scene at the end of the episode; when he dodges the first punch after tossing the jewel appraiser in the water, when he gets slammed back-first against the crate, when he pulls the rope and so on. (00:40:15)
Revealing mistake: Higgins disposes of one of the evil dock workers by letting loose a lot of barrels, but it's very visible that the man falls on his own in the way of the barrels for that stratagem to work. (00:40:50)
Revealing mistake: When Higgins KOs the main villain, two mistakes happen; first of all, the one already down for the count is buried in drums in a different way than shown before, and second and funnier, the stuntman who takes the fall from the pier is either wearing a wig or has a natural poofy head of hair - in either case, it's dry hair and not the wet thinning hair of Terence Knapp crawling out of the ocean. (00:40:55)
Visible crew/equipment: One of the barrels involved in the stunt that flattens one of the bad guys rolls towards the camera and hits it rattling it. (00:40:55)
