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_27117365_1 (written_by VARCHAR, us_viewers__million_ VARCHAR)
### Question:
Who wrote the episodes with 7.70 u.s. viewers (million) ?
### Answer:
SELECT written_by FROM table_27117365_1 WHERE us_viewers__million_ = "7.70"