McCoy: Well, I had to see it to believe it.

Spock: Explain.

McCoy: They’re about to lop off the captain’s professional head, and you’re playing chess with the computer.

Spock: That is true.

McCoy: Mr. Spock, you’re the most cold-blooded man I’ve ever known.

Spock: Why, thank you, Doctor.

Star Trek – Season 1: Episode 14 – “Court Martial”