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_name_75 (episode VARCHAR, airdate__usa_ VARCHAR)

### Question ###
Which episode aired in the USA on 20 May 2005?

### Accurate SQL ###

SELECT episode FROM table_name_75 WHERE airdate__usa_ = "20 may 2005"