Continuity mistake: Agatha is consoling Higgins for the loss at polo. She tells him that it was good strategy as she puts the pot down and puts her hand on the teacup. Next shot and as she elaborates she is holding nothing and putting her hand down to get the cup just then. (00:19:35)
Continuity mistake: During the chess game, Higgins does a Magnum on Agatha with his "I know what you're thinking...", causing her to raise her hands already at the very end of that specific shot. She will start the action all over again only later in a subsequent shot. (00:27:35)
Continuity mistake: When TC looks at a passing Ferrari and thinks about Magnum, the woman in close-up has her hair heavily windblown, while it's mostly still in the wider angle. (00:29:00)
Continuity mistake: TC gets anxious after passing by "She-Magnum" and honks at the cars in front of him at the traffic lights. It's obvious from the light and the buildings that the traffic lights shot is not matching the other views. (00:29:10)
Other mistake: Rick mentions "It'll take us half the night to limp home and I don't want to go through the reef in the dark with one engine." He's lying because he wants to spend the night with her, but even considering that, the fact that there are islands behind him as he speaks, but through all the rest of the scene both act as if they were in the middle of the ocean (she does not object, he looks out to sea with his binoculars), is a spoiler. (00:30:30)
Continuity mistake: Magnum's dad says on tape "I'll be home by the 4th." Both Magnum and his mom cheer. In close-up on Mrs. Magnum as the tape says "I hope so", Mini-Magnum is casting a shadow on her, but he was at greater distance in the previous shot, no shadow. (00:36:50)
Continuity mistake: TC and Higgins look into the guest house. From the top of the stairs looking down, there's a newspaper that is perfectly perched on top of the lamp shade. When they get downstairs and Higgins muses about abhorrent acts of perversion involving lizards, the sheet got limp. (00:37:45)
Revealing mistake: When Magnum screams to attract Rick's attention and you can see the whole yacht, you can spot the real driver of the boat on the flybridge, not lit. (00:41:00)
Other mistake: Magnum is 5 years old when his dad leaves for Korea, and is 6 by the time he's dead, coming back in a coffin on July 4th 1951. That does not work with the birthdate that appeared on the driver license in Memories Are Forever, episode 2-5, which is even abundantly referenced here with footage being re-used (Magnum's wedding party with bombs, and making love to his wife years later in the guest house). He was born January 5th 1946 in the document shown in close-up there.
Other mistake: Rick breaks off his hot date and goes searching for Magnum driving his boat for a long while -before- contacting Higgins to see if Magnum is missing at all. It also is the middle of the night and close to dawn (Magnum has to wait just one hour before the sun comes up) but Rick is still drinking wine (but not drunk) and hasn't even touched second base with the girl despite the fact that they were mixing wine and going below when the sun was still up.
Other mistake: Higgins says he hasn't seen Magnum (or his surf ski) "for two days", but Magnum left on the morning of the 4th, and has been in the ocean for 20 hours total. He spends the 4th on his own, but on the 3rd his friends and the ever-seeing majordomo of the estate should have gotten any sign of his presence.
Luther Gillis: File #521 - S4-E2
Continuity mistake: At the start, when Luther gets out of his car the license plate number is AUF-365, but after Magnum's visit to the ER, when Luther is at Robin's Nest his plate number is AUF-366. It's the same rented Ford Fairmont Futura. (00:02:40)
Luther Gillis: File #521 - S4-E2
Other mistake: The guesthouse scene with Magnum and Luther opens with a prolonged gag about Magnum "finally" getting an answering machine. It is said that it's the first time he gets one. But in the season 1 finale, "Beauty Knows No Pain", Magnum's client Barbara Terranova commented that the message on Magnum's answering machine mentioned the club. (00:03:25 - 00:18:00)
Luther Gillis: File #521 - S4-E2
Other mistake: The policeman opens the closet door in the most transparent "a corpse is going to fall off from here and I know it" way, stepping away from it and even looking down where the body will drop. (00:05:45)
Luther Gillis: File #521 - S4-E2
Continuity mistake: In jail, Luther asks Magnum "So you're a private detective, uh?" In close-up he's close to Magnum's knee, after the cut on Magnum correcting him with "Investigator" he's by his shoe. (00:06:20)
Luther Gillis: File #521 - S4-E2
Continuity mistake: Luther tells Magnum "We're working the same side of the street"; in that wider angle the shadow on Tom Selleck's face and the pillow - actually how deep onto the pillow he is lying - changes compared to the close-ups that follow and precede. (00:06:30)
Luther Gillis: File #521 - S4-E2
Continuity mistake: When Luther riles Tanaka up, at the beginning a cop with a yellow shirt and one with a black patterned one are in the background. First the yellow one, then the black one in separate shots move past the desk and exit stage left carrying a folder. A policewoman then does the same. In the second part of the scene all these people make their exit to the left again. (00:08:30)
Luther Gillis: File #521 - S4-E2
Continuity mistake: Magnum gets dropped by the bullet to the temple; his left arm is stretched outwards, right angle with the body, but when Luther kneels by him to check him out on that side, the arm is not in the way. (00:13:00)
Luther Gillis: File #521 - S4-E2
Factual error: Luther shoots at the two yo-yos who shot Magnum; he shoots 7 times in rapid succession and an 8th round as he runs closer, but he carries a revolver with a 6 bullets capacity. (00:13:05)
Luther Gillis: File #521 - S4-E2
Continuity mistake: Luther drives Magnum to the Nest while he shows him the book he wrote. During the trip, the cars behind either man in the rear window vanish at each cut, not appearing behind the other - particularly noticeable when a large truck roars past Luther right before Magnum tells him "Here we are" (00:14:30)
