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_29803475_2 (no_in_series INTEGER, us_viewers__million_ VARCHAR)
### Question:
What is the lowest number in series when U.S. viewers is 0.23 million?
### Answer:
SELECT MIN(no_in_series) FROM table_29803475_2 WHERE us_viewers__million_ = "0.23"