CREATE TABLE table_28170 ("No." FLOAT, "Title" CLOB, "Directed by" CLOB, "Written by" CLOB, "Original air date" CLOB, "Production code" CLOB, "U.S. viewers  ( million ) " CLOB)

Who directed the episode with 4.82 million U.S. viewers?
SELECT "Directed by" FROM table_28170 WHERE "U.S. viewers (million)" = '4.82'
SELECT "Directed by" FROM "table_28170" WHERE "U.S. viewers (million)" = '4.82'