Originally posted by Inglewolf in a Five-O mailing list over 20 years ago:

Besides falling off a cliff or building, getting blasted explosion style is another common Five-0 "violent way to die" cause of death. There were plenty of ka-boom moments, some with casualties, others without, and others where the threat of a big-kaboom amounted to a dud.

Deadly explosions
Strangers in Our Own Land (taxicab,bulldozer)
Samurai (grenade)
Deathwatch (car)
Force of Waves (boat)
The Reunion (package)
The Last Eden (sewage plant)
*Highest Castle, Deepest Grave (car)
Death is a Company Policy (helicopter)
V for Vashon, The Father (McGarrett's booby-trapped car)
I'm a Family Crook Don't Shoot (race car)
Engaged to Be Buried (car)
Why Wait Until Uncle Kevin Dies (boat, helicopter)
Death With Father (drug factory)
The Young Assassins (car)
*Bomb, Bomb, Who's Got the Bomb? (two cars)
A Gun For McGarrett (booby-trapped plaque)
Hit Gun For Sale (car)
Death's Name is SAM (helicopter)
Murder, Eyes Only (envelope)
*Nine Dragons (car)
**Double Exposure (car)
Up the Rebels (shack)
Shake Hands With the Man on the Moon (bar pay-phone)
When Does a War End (cannery)
Deadly Courier (attache case)
Number One With a Bullet, Part 1 (car)
Stringer (car)
Labyrinth (boat)
*(famous car goes off road, down hill and explodes seen)
**(car goes off road and explodes, but is different shot)
Near Deadly Explosions
Blind Tiger (McGarrett's car, McGarrett is blinded)
The $100,000 Nickel (car)
Murder, Eyes Only (envelope)
Oldest Profession--Latest Price (package, the hooker is critically injured but lives)
Blood Money is Hard to Wash (statue, maims the Five-0 team but doesn't kill)
Harmless Explosions
The Gunrunner (grenade)
The Reunion (car)
For A Million Why Not (nitro)
Air Cargo, Dial For Murder (jade shipment)
Anybody Can Build a Bomb (Kapialoni Park restroom)
Bomb, Bomb, Who's Got the Bomb (bomb dropped at sea)
Loose Ends Get Hit (car)
Non-explosions, no boom
To Hell With Babe Ruth
The Bomber and Mrs. Maroney
V for Vashon, The Father (first one in McGarrett's car)
The Clock Struck Twelve (two diffused)
Why Wait Until Uncle Kevin Dies? (Foster's propane tanks)
Anybody Can Build a Bomb (Mercury's big bomb)
A Hawaiian Nightmare (the volcano bomb)
Bomb, Bomb, Who's Got the Bomb (the second bomb is diffused)
A Capitol Crime

Danno diffused three bombs, McGarrett one--well two if you count pressing the garage door opener in "A Hawaiian Nightmare".

I left out the bogus bomb blast in "Welcome to Our Branch Office" and the lame-o looking runway blast in "Death's Name is SAM".

As always I may have left some titles out, most likely the last two and a half seasons that I find to unmemorable to memorize. Feel free to correct me and add to the list.