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_17467147_1 (directed_by VARCHAR, us_viewers__million_ VARCHAR)
### Question:
When there are  12.70 million u.s. viewers who is the director?
### Answer:
SELECT directed_by FROM table_17467147_1 WHERE us_viewers__million_ = "12.70"