Neural parasites
Kill them with light, but only
Ultraviolet

AND

Kirk lost his brother,
Sister-in-law and Spock lost
His sight for awhile

AND

Identify them:
Neural parasites look like
Petrified vomit

Poor Edith Keeler
Dead woman, but didn’t know
Kirk knows what he did

This thing is a mess
I don’t know what happened here
I search for the plot

No fighting allowed
The Organians meant it
Too hot to handle

No kill I — or you
Can’t we all just get along?
I’d like mine seared, thanks

OR

That thing killed fifty
Giant month-old pizza roll
McCoy can lay bricks

(Editor’s note: This entry is out of episodic order. This episode precedes “A Taste of Armageddon.”)

It all started here
Thanks to Khan, we later got
The best Star Trek film

They are tricky ones
Blow you up in their fake war
Give them the real thing

SPECIAL ADDITION:
Courtesy @seanmleary on Twitter:

Their bombs do not kill
The Enterprise can not blow
The greater good, lost

Question for Landru
Why do they wear bolo ties?
Oh, you’re a machine

OR

Peace, but at what cost?
Think I know who wrote this one
Libertarians

OR

This one’s important
First of many in which Kirk
Talks machine to death

Kirk was railroaded
Mr. Microphone proved it
Finney was not dead

The Metrons told them
“Don’t be fighting in our ‘hood
“Well, use this planet”

AND

Kirk versus the Gorn
A gun with diamond bullets
Good, very good, Kirk