CREATE TABLE table_24930 ("No. in series" FLOAT, "No. in season" 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 that has 3x6752 listed as the production code?
SELECT "Directed by" FROM table_24930 WHERE "Production code" = '3X6752'
SELECT "Directed by" FROM "table_24930" WHERE "Production code" = '3X6752'