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_26914076_4 (directed_by VARCHAR, us_viewers__millions_ VARCHAR)
### Question:
Who directed the episode that had 0.57 million U.S. viewers? 
### Answer:
SELECT directed_by FROM table_26914076_4 WHERE us_viewers__millions_ = "0.57"