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_23397386_2 ( viewers__millions_ VARCHAR, airdate VARCHAR )

### Question ###
How many million viewers watched the episode that aired on March 28, 2010?

### Accurate SQL ###

SELECT viewers__millions_ FROM table_23397386_2 WHERE airdate = "March 28, 2010"