Leonard McCoy is confronted with the unusual silicon-based Horta alien in "The Devil in the Dark" (1967), saying, "I'm a doctor, not a bricklayer." The line was used in "Terra Nova". Kelley himself parodied the phrase for a "Trivial Pursuit" commercial, in which the question is asked "How many chambers does a human heart have?" Kelley appears on screen and replies "How should I know? I'm an actor, not a doctor!". Leonard McCoy Dr. Leonard H. "Bones" McCoy is a character in the American science fiction franchise "Star Trek". First portrayed by DeForest Kelley in the , McCoy also appears in the
The Doomsday Machine (Star Trek: The Original Series) The Doomsday Machine (Star Trek: The Original Series) "The Doomsday Machine" is the sixth episode of the of the American science fiction television series "". Written by Norman Spinrad and directed by Marc Daniels, it was first broadcast on October 20, 1967. In the episode, the starship "Enterprise" fights a powerful planet-killing machine from another galaxy. The Federation starship USS "Enterprise", following a trail of mysteriously destroyed star systems, picks up the automated distress beacon of another starship, the USS "Constellation". Upon arrival, the "Constellation" is found drifting in space and severely damaged; Captain Kirk, Chief Medical Officer Dr. McCoy,