Character mistake: Twirling their moustache at the success of their operation, the villains say that the heroin is worth 10 million dollars. When Rick looks at all the drugs, he says it must be worth "a couple millions."
The Curse of the King Kamehameha Club - S1-E11
Character mistake: Poolside before his mysterious illness, Rick tells Magnum that the board wants to cancel the "ski surf" race. That'd be the "surf ski" race. He should know, he organizes it. (00:33:15)
Character mistake: Mrs. Pauley says that Magnum told her that Bobby is alive "a couple hours ago", but it was the day before. (00:42:25)
China Doll - S1-E3
Character mistake: As they are driving to uncle Han, Mai Ling says that 11 other members of her family might have died for the urn. Magnum speculates "Cousin Ho." But he called him "uncle Ho" in his "should have stayed in bed" voiceover at the beginning of the episode. (00:09:55 - 00:28:25)
China Doll - S1-E3
Character mistake: Rick is supposed to be at least competent in first aid, but there's a short (and awkwardly edited in) clip with TC trying to get up and groaning in pain where the taping around his torso is so loose he shouldn't have bothered at all. (00:25:10)
Character mistake: Higgins at the bar orders "Glencadam on the rocks", but it's been established since the pilot episode that he loathes ice in his drink of choice. (00:23:55)
Character mistake: Higgins is narrating one of his stories, this time implying that he helped Hemingway write "The Old Man and The Sea." Normally Higgins' stories are somewhat plausible because of factual accuracy that leaves room to be taken at face value, but here he says that it happened in "The Florida Keys, '53 or '54, it was." while "the manuscript was only in the outline stage." The novel was published in 1952. (00:10:30)
Character mistake: Higgins addresses constantly the Prince and Princess of Turbia as "Your Majesty." For an expert of protocol as Higgins, it's quite odd to make such a mistake; "Your Majesty" is used for royalty with a rank higher than Prince (kings, emperors). Paradoxically, Magnum gets it right, calling both "Your Highness." (00:06:30)
Character mistake: As he takes the elevator for the garage, Magnum's hat gets caught in the elevator doors before the camera cuts away. It's all fine on his head when he gets out. (00:42:15)
Character mistake: In the opening narration, Magnum says "Take my good friend Marcus, for example. I woke up one day and realised I was 32 and I'd never had a chance to be 22." In the second part of the very pilot of the series, Magnum says to Alice "One day I woke up age 33 and realised I'd never been 23."
Character mistake: Bickering with his pretend wife after risking his neck with the falling crates, Magnums says "we can stop playing house, I can go back to being a private detective, which is exactly what I should have been in the first place." Magnum has a verbal tic during the series and he fiercely corrects everyone when they call him a private eye, or detective, as he goes only by "investigator" (the I in P.I, after all). He's using the wrong word here. (00:22:35)
Character mistake: The Grim Reaper is at the party to grab the paper copy of the will - however, after Magnum is incapacitated turtle-style, the guy never bothers to actually retrieve it from the mantle he put it on, nor Magnum checks out what the piece of paper is. (00:35:05)
Character mistake: Carlton's favourite gun is a Colt "Bisley Model", rare and produced starting 1894. When he introduced it to Magnum in the cabinet he called it a "Colt 45, vintage 1860" (or sixty-something, as Magnum started his line when he might have not finished). (00:16:50)
Character mistake: Higgins boasts about playing chemin de fer with Ferdinand II at the resort, but there has not been any sovereign by that name in the 20th century. (00:20:40)
Operation: Silent Night - S4-E10
Character mistake: Higgins hearing the drunk sailor sing "Ukulele Lady" pitches in saying "Written in 1925 by Gus Kahn, Richard Whiting and Irving Berlin." The song was written by Kahn and Whiting only, who published it through Irving Berlin's eponymous record label. (00:10:50)
Squeeze Play - S4-E7
Character mistake: Misunderstanding which "Washington Senators" Mickey Dalrumple was referring to, Robin Masters says they went "out of existence in 1969." The Washington Senators ceased to exist with the 1971 season, before they relocated to become the Texas Rangers. (00:04:00)
Character mistake: When Magnum parks the car in front of the Kahala Towers, the word "parks" has to be used very loosely; the car stops on the left side and at little distance from another car on the right, effectively blocking the whole road. And that is in a moment of total quiet, not rushing out of the car to save a baby or something like that. Whoever parks their car like that deserves to be shot on sight. (00:12:10)
The Ugliest Dog in Hawaii - S1-E8
Character mistake: Steve gets on Rick's truck and tells him "Just follow that car." However, when we see what happens through TC's chopper, the van is in the lead, and the car is the one following - probably it was footage shot with the intention to reveal Magnum's plan earlier. (00:42:00 - 00:42:40)
