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_20 (series__number VARCHAR, season__number VARCHAR, directed_by VARCHAR)

### Question ###
How many episodes did Matthew Penn direct before season 22?

### Accurate SQL ###

SELECT COUNT(series__number) FROM table_name_20 WHERE season__number < 22 AND directed_by = "matthew penn"