Cocoon (1) - S1-E1
Continuity mistake: As McGarret goes to call the cops, Brent removes the knife from the John Doe assailant's hand. As the angle changes, Brent takes the knife from the dead man's hand again.
Continuity mistake: Danno drives away from 5-0 headquarters in a 1972 Ford LTD, but arrives at the crime scene in a '73 with a distinctively different front grill. (00:04:05)
Visible crew/equipment: When Danno pulls up to the beach house, several light panels are visible, reflected on the surface of his car door.
A Bullet for El Diablo - S6-E10
Plot hole: During his investigation, Danno learns that the kidnapped Maria never wears make-up. Yet in every single shot we see of her, Maria is far from cosmetics-free. She's wearing very heavy eye make-up. (00:34:40)
The Face of the Dragon - S1-E17
Character mistake: Near the end of the episode, McGarrett tells Dr. Kuh "The imposter Lewis Shen murdered your uncle." The uncle McGarrett is referring to was, earlier in the episode, referred to as Dr. Kuh's grandfather. (00:27:40 - 00:46:45)
The Clock Struck Twelve - S5-E12
Plot hole: As a security test, McGarrett secretly has several dummy bombs planted in the court building, then later shows the governor where they are. Each time he pulls one of the devices from its hiding place, citizens in the courthouse stroll casually by without so much as glancing at the loudly-ticking "bomb." No one knew about the test, so McGarrett's bombs should be attracting some attention, if not causing outright panic. (00:05:00)
'V' For Vashon: The Father (2) - S5-E10
Continuity mistake: From his office on the second floor, McGarrett looks out at the office building across the plaza. But the POV shot that follows is taken from ground level.
Continuity mistake: When the police cruiser with Danno aboard leaves HPD HQ, it's a 1967 Ford Galaxy 500 with wind wings. But in the next shot of it on the Honolulu streets, the car is a '71 or '72 model with no wind wings. (00:43:30)
Continuity mistake: At the end, McGarrett hands Filer an orange monopoly "Go Directly to Jail" card. In Filer's hand, the card is white. He hands it back to McGarrett and it's orange again.
You Don't Have To Kill To Get Rich -- But It Helps. - S5-E3
Revealing mistake: We see the body of Karen Bell 30 fathoms underwater, with her feet tied to a concrete block. But just before the shot cuts, the "corpse" wiggles its toes.
Death Wish on Tantalus Mountain - S5-E2
Visible crew/equipment: On top of the mountain, miles from any artificial light source, several studio lights and reflector panels are visible in the side of McGarrett's shiny black Mercury. (00:14:45)
The Bomber and Mrs. Moroney - S3-E22
Continuity mistake: The bomber wants revenge on Danno for killing his brother, Joey Collins, whose death is recapped in flashbacks to a first season episode in which Danno first killed someone in the line of duty. But in that episode, Joey's name wasn't Joey or Collins - it was Thad Vaughn. (00:22:00)
Three Dead Cows at Makapuu (1) - S2-E23
Visible crew/equipment: When the morgue lab techs come out into the hall to report to McGarrett, the closing glass door captures a brief reflection of the moving camera. (00:09:05)
Three Dead Cows at Makapuu (1) - S2-E23
Audio problem: The landing jumbo jet's tires start making skidding noises before they've actually touched the ground. (00:13:45)
Murder is a Taxing Affair - S6-E6
Revealing mistake: A bad matte superimposed over Cavel's rearview mirror makes McGarrett and Danno, who are actually in a car behind him, appear to be sitting in his back seat instead.
Continuity mistake: Stoner strikes Danno across the right cheek. But in the next shot, he's bleeding from the left corner of his mouth. (00:29:15)
Rest In Peace, Somebody - S4-E10
Character mistake: Cameron's attempt to assassinate the governor fails because McGarrett has everyone wear bullet-proof vests. It's been established that Cameron is brilliant, a top-of-his-class ex-cop and a crack shot. And he's been sending death threats, so he knows they'll expect him. Yet he fires at the governor's back and is shocked that the man doesn't die. Anyone with his expertise would have anticipated the vests, and aimed for the man's head. (00:48:20)
A Thousand Pardons -- You're Dead! - S2-E1
Continuity mistake: Pool balls redistributed on pool table between the time after the Sargeant breaks and McGarrett casually takes a shot. Especially, noticeable since Tommy, the other player, does not move off the table's edge after the break when two balls comes towards his position and his bottom or pants may interfere with their travel. In the next shot involving the table, those balls are not there and the rest of them seem more evenly distributed across the table. (00:35:40 - 00:36:10)
3,000 Crooked Miles To Honolulu - S4-E4
Audio problem: During McGarrett's second visit to question the professor, in the midst of their conversation, something off-camera makes a very loud thump. Professionals that they are, Buddy Ebsen and Jack Lord carry on with their lines as though nothing has happened. But this looks just a bit odd, because you wonder why their characters aren't curious about the noise. (00:34:10)
Air Cargo -- Dial for Murder - S4-E7
Visible crew/equipment: The crooks drive off in their blue '56 Chevy, capturing the reflection of a row of studio lights in the car's shiny side panel as it pulls away. (00:34:15)
Answer: He was fired. He never really appreciated his character. He felt Kono was portrayed as a big dumb Hawaiian and that the stereotype was racist. He also felt underutilized. He was fired after a heated argument with the show's publicist regarding his character. It seems there's not much details given regarding the incident or the firing, so it's seems possible he upset the show's producers as well.
Bishop73
No he said something derogatory about one of the Jewish producers that's why he was fired.