When the landing party is conversing around the marble table, there are several shots of Kirk in which three tall trees are prominent in the background behind him. The tree in the middle consistently shakes vigorously back and forth behind Kirk throughout all the shots, yet the other two trees remain still. If a wind that strong were shaking one of them that forcibly it would certainly at least stir the branches of the two neighboring trees, as well as ruffle the hair of the landing party.
Trivia: In this episode Chekov says he's 22 years old.
When Apollo throws Scotty across the courtyard, he hits a brick wall which wobbles noticeably.
Kirk tells the lieutenant "This far out we may never get help," but they are only 79 light years out. That does not seem too far for Star Trek travel and communication times.
When Kirk calls up to order Spock to fire phasers, he has trouble getting his communicator open and tries again (successfully). Fair enough, except both times it makes the little activation chirping noise.
When Apollo grows large, he towers over every tree on the landscape. But when they cut to closeups of his face, we can see taller trees behind him.
After Spock "punches holes" in the giant hand, it disappears - presumably we should see a giant hand with...holes in it, but we don't.
Palamas: (to Apollo) Is that the secret of your power over women? The thunderbolts you throw?
Apollo: I am Apollo!
Chekov: And I am the Czar of all the Russias!
Kirk: Mr. Chekov!
Chekov: I'm sorry, Captain. I've never met a god before.
Kirk: Would it have hurt us, I wonder, to have gathered a few laurel leaves?
McCoy: To coin a phrase--fascinating.
Apollo: Approach me. I said approach me!
Kirk: We're busy. (to Scotty) Look after the girl.
Apollo: You will gather laurel leaves! Light the ancient fires! Kill a deer! Make your sacrifices to me! Apollo has spoken!
Apollo: I would've cherished you, cared for you. I would have loved you as a father loves his children. Did I ask so much?
Kirk: We've outgrown you. You ask for something we can no longer give.
Apollo: Even for a god there's a point of no return.
Kirk: We're the same. We share the same history, the same heritage, the same lives. We're tied together beyond any untying. Man or woman, it makes no difference. We're human. We couldn't escape from each other even if we wanted to -- that's how you do it, Lieutenant! By remembering who and what you are! A bit of flesh and blood afloat in a universe without end. And the only thing that's truly yours is the rest of humanity. That's where your duty lies!
Kirk: Mankind has no need for gods. We find the One quite adequate.
Apollo: We're immortal, we gods. The Earth changed. Your fathers changed. They turned away, until we were only memories. A god cannot survive as a memory. We need love, admiration, worship, as you need food.
Apollo: You striving, bickering, foolishly brave humans.
Apollo: Earth -- mother of the most beautiful women in the universe.
Apollo: The time is past. There is no room for gods.
Spock: Insults are effective only where emotions are present.
Apollo: There is an order of things in this universe.
Kirk: We've come a long way in five thousand years.
Apollo: But you're still of the same nature.
Palamas: A father doesn't destroy his children.
Kirk: We're tired of your phony fireworks.
An early draft of this episode had Lt. Palamas pregnant with Apollo's child at the end of the episode. (A novelization of this episode by James Blish does in fact feature this plot twist.)
Gene L. Coon who co-wrote this episode is not given writing credit.
Desilu No: 5149-33.
Referencing the poem by Percy Bysshe Shelley, "Adonais: An Elegy on the Death of John Keats" (1821). It is a pastoral elegy written seven weeks after Shelley had learned of the death of his fellow writer.
In modern parlance Adonis (the more common spelling of the name) refers to a handsome, irresistible and sometimes terribly vain man. In ancient Greek and Roman mythology Adonis was originally the most beautiful mortal man ever born. The object of desire for both the goddesses Persephone and Aphrodite, Adonis spends four months of the year with each goddess and four months to himself thereby copying the passage of the seasons. He thus inextricably becomes linked to the cycle of life, death and rebirth. The passage from rebirth to life to death is followed by Apollo in this story, although his final passing seems to have no hope for resurrection. Interestingly considering his influence over Carolyn Palamas, Adonis was also the central figure in a cult whose adherents were all women.
Kirk: Don't you mean the English story of the Cheshire Cat?
Referring to a character from the classic children's novel Alice's Adventures in Wonderland (1865) by Charles Dodgson (aka Lewis Carroll). The Cheshire Cat is a sly creature who has the ability to appear and disappear at will, sometimes leaving behind only a smile.