CREATE TABLE table_73485 ("No. in series" FLOAT, "No. in season" FLOAT, "Title" TEXT, "Directed by" TEXT, "Written by" TEXT, "Original air date" TEXT, "Production code" TEXT, "U.S. viewers  ( millions ) " TEXT)

Name the original air date for ' don't look a smith horse in the mouth
SELECT "Original air date" FROM table_73485 WHERE "Title" = ' Don''t Look a Smith Horse in the Mouth '
SELECT "Original air date" FROM "table_73485" WHERE "Title" = ' Don\'t Look a Smith Horse in the Mouth '