I think that episode is THAT WHICH SURVIVES, and it's Lee Meriwether in that role. Julie Newmar showed up in a 2nd season episode, FRIDAY'S CHILD.

I may be in the minority here, but I have a soft spot for THE OMEGA GLORY. Now, I'm glad it wasn't the choice for the 2nd pilot (I understand it was among 3 or 4 choices, and fortunately they selected the right one!), but as a regular season episode, yeah it was hokey for all of that to be SO parallel to what happened on earth, but I dunno...I'm a sap for it, anyway. I liked it. It also portrayed a cool telepathic scene with Spock, where he didn't have to touch someone.

The 3rd season...yah. It was definitely on another level for me. I find all of the episodes enjoyable, but it isn't as entertaining a season overall as the first and second seasons were.