At eleven words, this has the longest title of any Star Trek episode.

James Doohan has an uncredited voice role as the Oracle.

Old Man: I climbed the mountains, even though it is forbidden.
Kirk: Why is it forbidden?
Old Man: I am not sure. But things... are not... as they teach us. For the world is hollow, and l... have touched the sky.

Natira: I hope you men of space, of other worlds, hold truth as dear as we do.
McCoy: We do.
Natira: I wish you to stay here... on Yonada... as my mate.
McCoy: But we're strangers to each other.
Natira: But is not that the nature of men and women... that the pleasure is in the learning of each other?

The Oracle: Kirk and Spock have committed sacrilege! You know what must be done!!

Spock: Your haemoglobin count is back to normal, Doctor, which indicates that the flow of oxygen to each cell of your body is back up to its abundantly energetic level.

What Changed in the Remastered Version: Yonada's opening missile salvo received an upgrade - missiles formerly represented as blobs of light now have detail and relative motion. Yonada received an upgrade that more accurately depicts an asteroid in space for millennia. The new Enterprise model permitted several improved shots of the relative motion of ship and asteroid, but the Enterprise should have been far smaller relative to the size of Yonada in one of these shots. Other effects, such as the Oracle's electrical attack and the operation of the Instrument of Obedience, went unchanged.