CREATE TABLE table_2226817_12 (original_air_date VARCHAR, production_code VARCHAR)

when was the episode premiere if the production code is 11.19?
SELECT COUNT(original_air_date) FROM table_2226817_12 WHERE production_code = "11.19"
SELECT COUNT("original_air_date") FROM "table_2226817_12" WHERE "11.19" = "production_code"