CREATE TABLE table_663 ("No. in series" FLOAT, "No. in season" FLOAT, "Title" CLOB, "Directed by" CLOB, "Written by" CLOB, "Original air date" CLOB, "U.S. viewers  ( million ) " CLOB)

What episode was directed by David Duchovny?
SELECT "Title" FROM table_663 WHERE "Directed by" = 'David Duchovny'
SELECT "Title" FROM "table_663" WHERE "Directed by" = 'David Duchovny'