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_23958944_5 (no_by_season INTEGER, us_viewers__in_millions_ VARCHAR)
### Question:
What episode was watched by 10.81 million US viewers?
### Answer:
SELECT MIN(no_by_season) FROM table_23958944_5 WHERE us_viewers__in_millions_ = "10.81"