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_25740548_2 (original_air_date VARCHAR, directed_by VARCHAR)
### Question:
How many episodes were directed by Tim Matheson?
### Answer:
SELECT COUNT(original_air_date) FROM table_25740548_2 WHERE directed_by = "Tim Matheson"