CREATE TABLE table_3453 ("No. in series" FLOAT, "Title" TEXT, "Directed by" TEXT, "Written by" TEXT, "Original air date" TEXT, "U.S. viewers  ( million ) " TEXT)

What was the original air date of the episode directed by gloria muzio?
SELECT "Original air date" FROM table_3453 WHERE "Directed by" = 'Gloria Muzio'
SELECT "Original air date" FROM "table_3453" WHERE "Directed by" = 'Gloria Muzio'