Guys,I have not accounted for the image possibly appearing in more than one episode (stock footage). So it is possible that either or both of you have guessed correctly. All I know for certain is that you haven't guessed the episode I'm thinking of at this point.
There are several Star Trek TOS episodes that have punctuation marks! I see five I think. As a bonus, only one spin-off series episode title has a punctuation mark like one of the TOS episodes. One as far as I know anyway.
Nelson, Mudd's Women, What Are Little Girls Made Of?, Who Mourns For Adonais?, Friday's Child, Mirror, Mirror, Is There In Truth No Beauty?, and Spock's Brain.
Assignment: Earth counts!Scott, What are Little Girls?, Who Mourns?, Is There in Truth No Beauty? All count!I had not considered the apostrophe. And that is a punctuation mark. So your additions of Mirror, Mudd's, Friday's, Spock's should count, plus the comma. Scott takes a commanding lead! Plus I hadn't thought of Dr. Bashir, I Presume? That is a surprise. I had another title in mind, but this counts. Scott takes the win with all the answers that Lee had not named that I had in mind, plus a bonus-bonus. If you want to try to name the other episode I had in mind, I can leave that unnamed for now.