I think it's notable that not a single episode picked thus far has made me go, "What??? You eliminated that!"
The list is getting down to eps wherein the major complaint is "Why would I want to watch that again? It just reeks of bad special effects, an 80's vibe, and mediocre plot"
For that I pick The Arsenal of Freedom.
Where No Man Has Gone Before
Coming of Age
Heart of Glory
Skin of Evil
The Neutral Zone