Who wrote the episode with 8.61 million U.S. viewers?
CREATE TABLE table_24648983_1 (written_by VARCHAR, us_viewers__million_ VARCHAR)
SELECT written_by FROM table_24648983_1 WHERE us_viewers__million_ = "8.61"
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_24648983_1 (written_by VARCHAR, us_viewers__million_ VARCHAR) Question: Who wrote the episode with 8.61 million U.S. viewers? [/INST] SELECT written_by FROM table_24648983_1 WHERE us_viewers__million_ = "8.61" </s>