Classic Star Trek: The Genuine Item vs. Obvious Inferior Forgeries

Oooh. This could be dangerous. Classic Star Trek available on the iPod...

What is real genuine Classic Star Trek, anyway?

I believe that there is universal agreement that the genuine Classic Star Trek canon includes the three movies Star Trek II: The Wrath of Khan, Star Trek IV: The Voyage Home, and Star Trek VI: The Undiscovered Country. (The other so-called "Classic" Star Trek movies--I, III, V, and VII--are, by universal agreement, dismissed as spurious interpolations added to the canon at a later date by unknown but untalented writers, producers, and directors.)

But I know of no similar agreement as to which of the one-hour Classic "episodes" are real Classic Star Trek and which are forgeries. Now that the first season is available on iPod format, this is an important question. I know of three first-season episodes that are definitely genuine: "The Devil in the Dark," "The City on the Edge of Forever," and "Balance of Terror." But what are people's views on the others?