(As usual click on the images to enlarge. You might have to click again once it opens to view full-size.)
"Mr. Spock, remind me to keep the temperature down on the bridge in the future."
Bonus: a page from one of the movie magazines back during the series third season, from February of 1969..
Bonus: the packaging of the Pocket Flix film viewer that supplied fans with their own (one-minute) clip for watching whenever they wanted! I bought one about 1978 and it was the first time I could actually "watch" a real part of an episode. This was before videotape players were available to most, and certainly to me. It was taken from the episode "By Any Other Name," and was edited together from the scene where the two security guards were reduced to polyhedrons, and the scene of the barrier-crossing, which was very exciting to own! Such was my mania that I even dubbed those scenes from one of my cassette tapes of the episode to match the editing of the film, then would synch them up as I watched to supply sound!