Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
### Context:
CREATE TABLE table_17641206_8 (episode VARCHAR, original_airdate VARCHAR)
### Question:
How many episodes aired on 22january2009
### Answer:
SELECT COUNT(episode) FROM table_17641206_8 WHERE original_airdate = "22January2009"