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_23117208_5 (no_in_series VARCHAR, directed_by VARCHAR)

### Question ###
For the episode directed by Matthew Penn, what is the total number in the series?

### Accurate SQL ###

SELECT no_in_series FROM table_23117208_5 WHERE directed_by = "Matthew Penn"