This is very difficult and I will take the easy way out and say they are in no particular order:
Nightmare in Blue
Hookman
V for Vashon: The Son (If I must break up the three)
Over 50? Steal
Man in a Steel Frame
Beautiful Screamer
Pig in a Blanket
The Bells Toll at Noon
Nine Dragons
Yesterday Died and Tomorrow Won't Be Born

My honorable mention is the 90 Second War. I will admit I don't like this episode as much as I used to but growing up it was always one of my favorite episodes in syndication. The car accident, Wo Fat, the submarine, the secret mountain government base, the doppleganger McGarrett, etc.