Who directed the episode that was viewed by 2.57 million people in the U.S.?
CREATE TABLE table_11820086_1 (directed_by VARCHAR, us_viewers__millions_ VARCHAR)
SELECT directed_by FROM table_11820086_1 WHERE us_viewers__millions_ = "2.57"
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_11820086_1 (directed_by VARCHAR, us_viewers__millions_ VARCHAR) Question: Who directed the episode that was viewed by 2.57 million people in the U.S.? [/INST] SELECT directed_by FROM table_11820086_1 WHERE us_viewers__millions_ = "2.57" </s>