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
Star Trek: The Original Series Nyota Uhura (Nichelle Nichols), the first African-American woman to hold such an important role in an American television series; the captain's yeoman, Janice Rand (Grace Lee Whitney), who departed midway through the first season; and Christine Chapel (Majel Barrett), head nurse and assistant to McCoy. Walter Koenig joined the cast as Ensign Pavel Chekov in the series' second season. In February 1966, "Star Trek" was nearly cancelled by Desilu Productions, before airing the first episode. Desilu had gone from making just one half-hour show ("The Lucy Show"), to deficit financing a portion of two expensive hour-long shows, "" and "Star