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_23117208_3 (no_in_series INTEGER, viewers__millions_ VARCHAR)
### Question:
when the number of spectator are 5.28 millions, which is the smallest number of the episode in series? 
### Answer:
SELECT MIN(no_in_series) FROM table_23117208_3 WHERE viewers__millions_ = "5.28"