CREATE TABLE table_29372 ("No. in series" FLOAT, "No. in season" FLOAT, "Title" TEXT, "Directed by" TEXT, "Written by" TEXT, "Original air date" TEXT, "Production code" FLOAT, "U.S. viewers  ( millions ) " TEXT)

How many times did an episode with a production code of 12003 was aired?
SELECT COUNT("Original air date") FROM table_29372 WHERE "Production code" = '12003'
SELECT COUNT("Original air date") FROM "table_29372" WHERE "Production code" = '12003'