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_26961951_6 (no_in_series INTEGER, us_viewers__million_ VARCHAR)
### Question:
Which episode number had a viewership of 0.56 million?
### Answer:
SELECT MAX(no_in_series) FROM table_26961951_6 WHERE us_viewers__million_ = "0.56"