Hawaii Five-O (1968–1980)
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A Hawaiian Nightmare 

A man who's an expert in both geology and explosives, owes loan sharks more than $72,000. He has planted explosives that, if set off, will cause volcanic eruptions and is demanding $500,000... See full summary »



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Episode complete credited cast:
Al Harrington ...
Kam Fong ...
Bernie Brown
Felice Orlandi ...
Seth Sakai ...
Dr. Rogers
Roger Ritchie ...
Fred Tompkins (as Roger S. Ritchie)
Liwai Napuelua Jr. ...
Richard George Carter ...
William Gordon Lacy Jr. ...
Doris Brown


A man who's an expert in both geology and explosives, owes loan sharks more than $72,000. He has planted explosives that, if set off, will cause volcanic eruptions and is demanding $500,000 from the state of Hawaii. He has killed accomplices and is prepared to go through with his threats. But he doesn't know his fed-up wife is preparing to double cross him. Written by Bill Koenig

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Crime | Drama | Mystery


Not Rated | See all certifications »




Release Date:

17 September 1974 (USA)  »

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Aspect Ratio:

1.33 : 1
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User Reviews

Aside from a little bit of psychic detective work, a pretty good episode.
9 August 2011 | by (Bradenton, Florida) – See all my reviews

First off, you need to know that psychics are NOT a theme in the show and no psychics are even shown in "A Hawaiian Nightmare". I said 'psychic detective work' because it seemed as if McGarrett was psychic, as he suddenly made a HUGE and highly accurate guess that seemed out of left field--and this makes the episode rather weak.

The show begins with three guys planting explosives around the volcano fields on the Big Island (Hawaii). Suddenly, the boss kills the two helpers--and it's pretty obvious that he's niceness-impaired. It turns out this guy (familiar TV character actor James Olson) is in debt to the mob and he's come up with a scheme to extort $500,000 out of the State NOT to detonate the fields (thus causing a river of lava to roll into the city of Hilo). And, considering he is a demolitions expert and has the know-how to pull it off, things look bleak. There is a monkey wrench in his plan, however, as his wife (Sheree North) has her own plans...

Twice McGarrett makes a couple deductive jumps. The first time isn't a huge jump--but it's a jump when he VERY quickly decides that Olson must be the extortionist who sent the letter to the Governor. The big one, however, is late in the show when the military and Five-O must disarm the many bombs planted across the park. Just before Danno (is there NOTHING he can't do--an expert at munitions, a marksman and a darn fine cop!) is about to disarm the trigger, McGarrett wildly guesses out of left field how to stop the device! Heck, it was also VERY likely that what he did should have triggered the device or had no effect at all--but, this is TV, so you know they aren't going to wipe out a city--making it a bit anticlimactic. Still, the plot is inventive and interesting.

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