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
Leonard McCoy character's prominence, Kelley's contract granted him only a "featuring" credit; it was not until the second season that he was given "starring" credit, at the urging of producer Robert Justman. Kelley was apprehensive about "Star Trek"s future, telling Roddenberry that the show was "going to be the biggest hit or the biggest miss God ever made". Kelley portrayed McCoy throughout the original "Star Trek" series and voiced the character in the animated "Star Trek". Kelley, who in his youth wanted to become a doctor like his uncle, but whose family could not pay for a medical education, in part drew