I've been reading some original series scripts lately (special thanks to Sir Rhosis) and as I do I take note of little interesting bits which didn't make it to the air. Sometimes it's a trimmed line of dialog which explains something left vague in the aired episode, other times it's scene direction which makes clear something which people thought was a mistake but was intentional. Some of this has been mentioned elsewhere, but I'm posting ones that stuck out to me and which I suspect many people don't know. (I'm only going to note those not already covered in the Orion Press notes on the episodes. They may have gotten mentioned in the These Are the Voyages books, but I've not read those.) Here are a few from two episodes: ARENA Final Draft November 3, 1966 The script specifies that the Gorn ship is never inside visual range. There is nothing to indicate it should ever be shown (as was added in the TOS-R version). Also, the "bamboo" isn't really bamboo. It's described this way: The production failed to convey that detail. That'd change the Mythbusters test a bit. Spock also rattles off the proportions of the elements of the gunpowder as Kirk mixes it. "75. 15. 10." Orion Press article on "Arena" (link) SPACE SEED Second Revised Final, December 13, 1966 Deleted dialog actually clarifies exactly where the Botany Bay was headed: ...and... So, clearly the supermen had a destination and plan in mind. The "armaments" suggest a lot about their mindset as conquerors. Finally, Bones had this howler of a line: Would someone less of a hunk not be worth fighting to save, Bones? Or are you swooning along with Marla? Orion Press article on "Space Seed" (link).