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_20205538_4 (episode__number VARCHAR, series__number VARCHAR)
### Question:
What is the episode number for series 17?
### Answer:
SELECT episode__number FROM table_20205538_4 WHERE series__number = 17