CREATE TABLE table_3672 ("No." FLOAT, "#" FLOAT, "Title" CLOB, "Directed by" CLOB, "Story by" CLOB, "Teleplay by" CLOB, "Original air date" CLOB, "U.S. viewers  ( millions ) " CLOB)

Who directed the episode that had 0.54 million U.S. viewers?
SELECT "Directed by" FROM table_3672 WHERE "U.S. viewers (millions)" = '0.54'
SELECT "Directed by" FROM "table_3672" WHERE "U.S. viewers (millions)" = '0.54'