CREATE TABLE table_3536 ("Series #" FLOAT, "Season #" FLOAT, "Episode Title" TEXT, "Original airdate" TEXT, "Prod. No." TEXT)

What was the original airdate of the episode with production number 2x03?
SELECT "Original airdate" FROM table_3536 WHERE "Prod. No." = '2x03'
SELECT "Original airdate" FROM "table_3536" WHERE "Prod. No." = '2x03'