“Capt. Kirk: Bones, you ever hear of a doomsday machine? Dr. McCoy: No, I'm a doctor, not a mechanic.”— Max Simon Ehrlich, Gene L. Coon, James T. Kirk, William Shatner, imdb.com
“Bones: I'm a doctor, NOT an engineer. Scotty: NOW you're an engineer.”— Jerome Bixby, Leonard McCoy, DeForest Kelley, imdb.com