Reference in a $1,600 clue in the category "Broadway Musicals", its writer (L. Frank Baum) was answer to the Final Jeopardy! category "Authors." The clue was: "In 1890, this author witnessed a tornado in South Dakota which influenced the writing of his most famous book." (None of the contestants got it right.) Alex Trebek also revealed that the Oz movie had been "filmed right in this studio lot."