CREATE TABLE table_74206 ("Series #" FLOAT, "Season #" TEXT, "Title" TEXT, "Directed by" TEXT, "Written by" TEXT, "Original air date" TEXT, "U.S. viewers  ( millions ) " TEXT)

Who wrote episode 23 in the season?
SELECT "Written by" FROM table_74206 WHERE "Season #" = '23'
SELECT "Written by" FROM "table_74206" WHERE "Season #" = '23'