TOS: The Devil in the Dark, streamed on Netflix.
After all these years, I just now noticed that Giotto wore two solid braids, which would have made him a full commander, outranking both Scotty and McCoy, but he is referred to as a lieutenant commander in the episode.
Also, the Horta is based on silicon or silicone? If it were the latter, McCoy could have bandaged the wound with a few dozen tubes of caulking from Home Depot.