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_21312959_1 (no_in_season VARCHAR, us_viewers__millions_ VARCHAR)
### Question:
How many episodes had the us viewers (millions) figure of 5.0?
### Answer:
SELECT COUNT(no_in_season) FROM table_21312959_1 WHERE us_viewers__millions_ = "5.0"