McCoy repeats the line when he must perform some task beyond his medical skills, such as the "classic moment" when he is confronted with the unusual silicon-based Horta alien in "The Devil in the Dark" (1967), saying, "I'm a doctor, not a bricklayer."
McCoy upprepar repliken när han måste utföra en uppgift utöver sin medicinska kompetens, som exempelvis den "klassiska ögonblicket" när han konfronteras med den ovanliga kiselbaserade utomjordingen Horta i "Devil in the Dark" (1967), där han säger, "I'm a doctor, not a bricklayer."