What date did Episode 22 originally air?
CREATE TABLE table_23392257_4 (original_airdate VARCHAR, _number VARCHAR)
SELECT COUNT(original_airdate) FROM table_23392257_4 WHERE _number = 22
### Context: CREATE TABLE table_23392257_4 (original_airdate VARCHAR, _number VARCHAR) ### Question: What date did Episode 22 originally air? ### Answer: SELECT COUNT(original_airdate) FROM table_23392257_4 WHERE _number = 22