CREATE TABLE table_30022 ("Series #" FLOAT, "Episode #" TEXT, "Title" TEXT, "Directed by" TEXT, "Written by" TEXT, "Original air date" TEXT, "U.S. viewers  ( millions ) " TEXT)

Who directed episode number 23 in the season?
SELECT "Directed by" FROM table_30022 WHERE "Episode #" = '23'
SELECT "Directed by" FROM "table_30022" WHERE "Episode #" = '23'