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_25691838_2 ( guest VARCHAR, production_code VARCHAR )

### Question ###
Who were the guests in the episode with production code 6021?

### Accurate SQL ###

SELECT guest FROM table_25691838_2 WHERE production_code = 6021