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_24938621_3 (no VARCHAR, written_by VARCHAR)
### Question:
What episode number was written by Gregg Hurwitz?
### Answer:
SELECT no FROM table_24938621_3 WHERE written_by = "Gregg Hurwitz"