The Enterprise has come to a planet which is only inhabited by a researcher and his wife Nancy. Kirk, Dr. McCoy, and another person (who isn't mentioned in the voice over, hint hint) beam down to check on the researcher and give them supplies they have asked for, salt. It turns out that Nancy is an old love of Dr. McCoy. When they beam down, they meet up with Nancy first, they don't realize that they each see her as a different person. The third crewman sees her as a beautiful woman he had seen on some pleasure planet so he of course makes some rude comments and is told to wait outside. At some point she went out, ostensibly to tell him she wasn't offended, and she "finds him" dead with red marks on his face.
|blue shirt, Why not red shirt?|
|So that's where those red circles came from|
Kirk to McCoy about Nancy "Stop thinking with your glands"
Yomen carrying the food to the creepy follower "Why don't you go chase an asteroid?"
To me, this episode is really on the low end of acceptable. There was very little exploration about the monster's past or what happened to it's society, that would have been interesting. And a more satisfying ending could have made it a lot better as well, it was just like "this is the last of his species, aaaaaand dead. Welp, let's fly off to our next mission." Not really any character development for any of the main characters either, so it's not like this was a backdrop of sorts so that we would have much of a chance to get to know the bridge crew or the enterprise. Please let me know how you would rate it in the comments.