All Roads Lead to Floyd - S1-E13
Revealing mistake: During the credits, look at the car when Andy Romano's name pops in view; the antenna and the steering wheel are on the right of the vehicle. In the rest of the episode, they are on the correct side (the left). (00:01:40)
All Roads Lead to Floyd - S1-E13
Revealing mistake: The sequence with Floyd making a couple calls at the payphone presents a rather unusual mistake. Noah Beery Jr. looks away before he's done dialing the phone number...and he misses. His finger pushes on the chrome of the keypad missing the actual "1" key, but the scene just goes on and he dialed the right number anyway. (00:09:55)
All Roads Lead to Floyd - S1-E13
Revealing mistake: When Bull pushes Magnum against a shelf during the final fight, the stuntman with a thin stage 'stache is seen. (00:44:50)
All Roads Lead to Floyd - S1-E13
Revealing mistake: After the shootout at the Ponzi scheme party, Floyd drives his prehistoric Honda in traffic with Magnum at his side. "Magnum" does not have his moustache - it's just some big guy in a Hawaiian shirt they put there as body double without even a fake stache. (00:25:00)
All Roads Lead to Floyd - S1-E13
Revealing mistake: Magnum tries to persuade TC that he can invite anybody over anytime; at the same time, we should be persuaded that the extras who look nothing like Tom Selleck and Roger E. Moisley and whose lips are not moving are the actual Magnum and TC having a conversation. (00:06:00)
Revealing mistake: On the docks, Magnum saunters towards a payphone. The phone is not exactly a sturdy or well made prop, because it wobbles even before Magnum touches it. (00:26:40)
Revealing mistake: When Magnum wakes up finding the tape recorder on the pillow, his collarbone scar shows the contour of the prosthetic patch. (00:13:20)
Revealing mistake: When the bad guys try to escape from the warehouse, multiple tiremarks of their highly unusual maneuver (a sharp turn that leads away from the door, in that precise spot) are already visible on the ground, no doubt from previous takes. (00:44:45)
Revealing mistake: In the longshot of the fight when the phone begins to ring, the stuntman replacing Roger E. Mosley is quite visible. (00:37:05)
The Curse of the King Kamehameha Club - S1-E11
Revealing mistake: En route to the hut of the kahuna, TC is reading from a book. He reads "That is why curses or warning of death prayer" making exaggerated motions that undoubtedly establish that sentence being at the bottom of the page. Magnum then urges him to go on "That is why what?", and he resumes reading, but he's reading now (and again, makes very obvious he's reading and not just repeating from memory) from the opposite page. (00:17:35)
The Curse of the King Kamehameha Club - S1-E11
Revealing mistake: When Mrs. Macao serves the fake beer to Mr. Dollinger, on the floor you can spot two lines; it's the spikes marking the spots where Tom Selleck and Elizabeth Smith stand a few seconds later to talk to him. (00:28:00)
Revealing mistake: The pursuing Marines call for backup, and a second jeep answers the call - through mirrored footage, though; the driver is on the right side. (00:43:30)
Revealing mistake: The article Magnum reads in his Ferrari, by the title "Local judge offered high court seat" begins like this; "A former Los Angeles Veterans young actress, a bone of contention feet wide and eight feet high. Powered by electricity, it carries its own won't even pay that." Filler text can't get better than that. (00:21:25)
Revealing mistake: Right after Newton drags his girlfriend to the ground and before Magnum spots him and takes aim, Eric walks at the top of the barge...but it's not the Eric we see then in close-up; it's a burlier guy dressed the same.
Revealing mistake: In a fun bit of 'movie computer science in the 1980s' that ends up with a beeping alarm and odd full-screen warning in ugly vectors for protected data, Mac types the name of the Lt. Eric Tobin with keystrokes that can't possibly match those letters. (00:11:15)
The Curse of the King Kamehameha Club - S1-E11
Revealing mistake: When Henry Lewis falls forward in his surf ski, the boat keeps going and it wobbles the camera. (00:08:50)
The Ugliest Dog in Hawaii - S1-E8
Revealing mistake: Magnum punches the baddies who tried to dogjack them at the gas station. Old Mr. DiGorgio drives the car and picks them up. Not so old, actually, because Michael V. Gazzo is substituted at the wheel by a younger and leaner stuntman with a fake stache. (00:21:35)
The Ugliest Dog in Hawaii - S1-E8
Revealing mistake: The moment Mitch and the other goon walk away leaving Victor DiGorgio in the car, you can spot in the background Michael Hasegawa in his private cop uniform waiting for his cue to enter stage, and just pretend to randomly notice the parking violation. (00:03:10)
Never Again... Never Again - S1-E7
Revealing mistake: Magnum catches the boat that already sailed away through a great feat, leaping from the pier. The editing trick is fairly obvious; the stuntman's leap is not quite reaching, headed to a platform we can spot at the bottom. But it cuts then to Tom Selleck who with a true airwalking prodigy connects right with the top of the railing, pulling himself aboard. (00:43:25)
Never Again... Never Again - S1-E7
Revealing mistake: The day for night filming is particularly obvious at the entrance fence, and when the two mysterious guys try are kneeling outside of the house wondering how many people they have to deal with, with just 4 shots; you can see perfectly white clouds. It's even worse later in the episode when the Ferrari stops in front of the doctor's house; you can literally see the sun shine reflected by the car and the wet asphalt throughout the whole scene. (00:26:15)