Other mistake: The team, guns up, aimed, and ready, interrupt the meeting on the rooftop which has just ended in a shootout. Steve tells Cynthia to put the gun down or they'll have to put her down, and Junior menacingly cocks his rifle as if to emphasise the point. What, it wasn't already ready to fire? He's walked into a potential firefight with his weapon raised but it wasn't actually fireable yet?
Factual error: Thieves make off with 10 million dollars transferred to an offshore bank. The money is shown supposedly in a medium-sized black satchel carried in one hand by one of the accomplices. The largest US bill in circulation is the $100 bill. And one million dollars in $100 bills weigh 22 pounds. So ten million would weigh 220 pounds. There is no way that amount would fit in such a satchel, and much less be carried around dangling by one hand.
Factual error: A CIA officer stops McGarrett and companions from entering a house to make an arrest. The mistakes here are numerous: 1 - The "CIA officers" have protective vests that say "CIA" on them. No such thing. 2 - They are carrying weapons. Only officers in the Security Protective Service and those officers in a war zone carry weapons. 3 - The CIA is not a law enforcement agency. The FBI handles matters domestically. 4 - The CIA's responsibility is to collect intelligence and information overseas. Last I looked, Hawaii was part of the United States. (00:33:10)
Factual error: Higgins gets counterintelligence documents from an operative. The document says "CLASSIFIED" at the top. A real document would have the actual classification, e.g., TOP SECRET - NOFORN; SECRET, etc. on it and not the word "classified." To make matters worse, at the bottom the word is misspelled "CLASSAFIED" (00:27:30)
Visible crew/equipment: McGarrett and Magnum are working together in this crossover show. They leave a suspect's house and before the scene changes they are outside, and through the door windows you can see a crew member through the glass moving right to left. This is supposed to be an empty house. (00:19:00)
Other mistake: Five-0 discover the camouflaged crash of a Cessna supposedly carrying 170 pounds of heroin (as mentioned previously) in the jungle. The heroin is indeed discovered inside the plane, but the heroin is still neatly stacked in the back seat, even though it does not seem to have been secured. Related, a DEA agent had mentioned that there was 100 million dollars worth of heroin being brought to Hawaii. 170 pounds has a street value (according to the DEA website) of $800,000 per 20 pounds. This would only be $6.8 million, not $100 million. (00:25:30)
Factual error: The Five-0 team is discussing the helicopter incident where three people were killed. Junior states that they could find no prints or DNA at the helicopter. Yet the helicopter was full of blood, and the perpetrator (seen later) was covered with bloody wounds. It would have been impossible NOT to find the killer's DNA at the very least in the blood. (00:08:30)
Character mistake: McGarrett's team is in place for an assault. One of the members spots the "Rosita", a ship, not a person as they expected. But he calls it a Panamax ship, which it definitely is not. It is a smallish container ship, incapable of hauling 4,500 containers as a Panamax ship could. (00:23:57)
Factual error: A man gets out of his car and identifies himself as a Special Agent. He shows McGarrett a badge and an ID card identifying him as a Special Agent of the CIA. There is no such thing. The CIA does not have Special Agents. They have Operations Officers. And it would be extremely unlikely they would have a badge, as they are not law enforcement officers. (00:01:45)
Factual error: The plane taking McGarrett from Panama to Mexico purports to be owned by a Mexican fishing company. But the registration number on the plane starts with an N and has 5 numbers and a letter. First of all, a Mexican aircraft would not have a registration number starting with an N. That is reserved for aircraft of US registry. All that aside, the registration number is invalid. US aircraft have at most five characters after the N. The registration - as I suspected - was shown to be in an invalid format when queried in the Federal Aviation Administration database. (00:11:18)