text: 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_12159115_2 (production_code VARCHAR, us_viewers__millions_ VARCHAR)
  ### Question:
  What's the production code of the episode seen by 11.64 million US viewers?
  ### Answer:
  SELECT production_code FROM table_12159115_2 WHERE us_viewers__millions_ = "11.64"