What was the original air date for season number 2?
CREATE TABLE table_21781578_2 (original_air_date VARCHAR, season_no VARCHAR)
SELECT original_air_date FROM table_21781578_2 WHERE season_no = 2
### Context: CREATE TABLE table_21781578_2 (original_air_date VARCHAR, season_no VARCHAR) ### Question: What was the original air date for season number 2? ### Answer: SELECT original_air_date FROM table_21781578_2 WHERE season_no = 2