FAV Classic HFO Ending (1968-1980)

I think my FAV Classic HFO ending is Season 6 Why Wait Til Uncle Kevin Dies? Reversions Inc bomb expert Luke Foster becomes skillfully trapped with his own bomb. He visits Uncle Kevin place to take him out like a few others. Just thought it was very creative. McG visits Reversions Inc before they evade capture and they are apprehended. Watching this as a teenager, it quickly became a FAV ending and episode. Still 1 of my FAV endings today. What would be your FAV Classic HFO ending of an episode? JC

That's an easy one for - not really due to a plot twist or anything but entirely based on the coolness of the last line of the show:

Aloha.......Aloha Suckers!!!

Of course from 3,000 Crooked Miles to Honolulu

“Man in a Steel Frame”….I love seeing McGarrett beat the shit out of a slimeball in the surf.

A couple more that came to mind:
Death with Father - sort of an unexpected but drastic ending to that one
One Big Happy Family - due to the shock on McGarrett's face when Sadie goes on how they rationalize killing people