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_name_42 (episode__number INTEGER, airdate VARCHAR)
### Question:
What is the lowest episode # with an air date of October 31, 2001?
### Answer:
SELECT MIN(episode__number) FROM table_name_42 WHERE airdate = "october 31, 2001"