Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: 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?

### Accurate SQL ###

SELECT MIN(no_in_series) FROM table_23117208_3 WHERE viewers__millions_ = "5.28"