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_25923164_1 (directed_by VARCHAR, us_viewers__million_ VARCHAR)
### Question:
Who directed the episode that had 12.88 million viewers?
### Answer:
SELECT directed_by FROM table_25923164_1 WHERE us_viewers__million_ = "12.88"