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_22580855_1 (series_no INTEGER, us_viewers__millions_ VARCHAR)
### Question:
which is the  maximun serie episode number when the millions of North American spectators is 3.14?
### Answer:
SELECT MAX(series_no) FROM table_22580855_1 WHERE us_viewers__millions_ = "3.14"