CREATE TABLE table_28084 ("Series #" FLOAT, "Season #" FLOAT, "Title" CLOB, "Directed by" CLOB, "Written by" CLOB, "Original air date" CLOB, "Production code" CLOB, "U.S. viewers  ( million ) " CLOB)

How many original air dates are there for the episode with code CA210?
SELECT COUNT("Original air date") FROM table_28084 WHERE "Production code" = 'CA210'
SELECT COUNT("Original air date") FROM "table_28084" WHERE "Production code" = 'CA210'