Mistakes
Probably due to poor sound pick-up outdoors so near the ocean, much of the dialogue on the beach house patio is noticeably overdubbed. The sound is often out of sync with the actors' lips. See more...
Trivia
Throughout the first two seasons, both McGarrett and Danno often referred to "Chief Dann of HPD." This was a thank-you to CBS programming chief Mike Dann, who helped first persuade the network to put Hawaii Five-0 on the air, and also got it a better time slot later on. See more...
Movie Mistakes blog
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Hawaii Five-O (1968) - 3 with pictures
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Screenshots of mistakes that have been online for less than a year are only visible to members, but the rest are available to everyone. Don't forget to check out the picture of the day, updated daily, and the top 30 screenshots too.