"The Magicks of Megas-tu" is the eighth episode of the first season of the American animated science fiction television series Star Trek: The Animated Series. It first aired on NBC on October 27, 1973, and was written by Larry Brody, who had originally pitched the idea for the third season of Star Trek: The Original Series. However, according to Brody the dialogue was mostly re-written by series creator Gene Roddenberry.