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_18569389_1 (directed_by VARCHAR, us_viewers__million_ VARCHAR)
### Question:
Name who directed the episode that was viewed by 4.22 million
### Answer:
SELECT directed_by FROM table_18569389_1 WHERE us_viewers__million_ = "4.22"