CREATE TABLE table_31443 ("Series #" FLOAT, "Season #" FLOAT, "Title" CLOB, "Directed by" CLOB, "Written by" CLOB, "Original air date" CLOB, "Viewers  ( million ) " CLOB)

Who directed the episdoe veiwed by 3.24 million viewers?
SELECT "Directed by" FROM table_31443 WHERE "Viewers (million)" = '3.24'
SELECT "Directed by" FROM "table_31443" WHERE "Viewers (million)" = '3.24'