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_27553627_2 ( season VARCHAR, rank VARCHAR )

### Question ###
When was the season finale that ranked 20th?

### Accurate SQL ###

SELECT season AS finale FROM table_27553627_2 WHERE rank = "20th"