This bit from "Angels and Demons":
- Kirk: After all, to seek out new life and new civilizations is our mission. To boldly go where no man has gone before.Spock: A split infinitive, Captain.Kirk: ...What?Spock: The proper grammatical expression is "to go boldly, where no man has gone before."Kirk: Somehow, I think it loses a little in the translation.
From the episode "Voids". Where Spock is captured by a mysterious alien. Kirk, along with Chekov and Sulu, are trying to figure out what to do next, leading to this: