Related:

• McCoy: "Where're you gonna find Spock's brain?" Kirk
  Is this a trick question, Bones?" -- "Spock's Brain", Stardate 5431.6...
• Brain. Brain. What is brain? -- Kara the Eymorg, "Spock's Brain," stardate 5432.3.
• Logic and practical information do not seem to apply here.
  You admit that? To deny the facts would be illogical, Doctor....
• McCoy: "Spock's contaminating this boy, Jim." -- "Who Mourns For Adonais?", Stardate 3468.1.
• Spock: "Ahh, Mister Scott, I understand you're having difficulty with the warp drive.
  How much time do you require for repair?" Scott: "There's nothing wrong with the bloody things....
• McCoy: "I'm a doctor, not an escalator." -- "Friday's Child", Stardate 3497.2.
• Kirk: "Mister Spock, the ship is yours." Spock: "Jim, be careful.
  McCoy: "*We* will." -- "STII:TWOK", Stardate 8130.4...
• This child is about to wipe out every living thing on Earth.
  Now what do you suggest we do? Spank it? -- McCoy, "The Motion Picture," stardate 7411.4....
• Virtue is a relative term. -- Spock, "Friday's Child," stardate 3499.1.