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_2818164_8 (no_in_series VARCHAR, directed_by VARCHAR)

### Question ###
the episode directed by art dielhenn was what number in the series? 

### Accurate SQL ###

SELECT no_in_series FROM table_2818164_8 WHERE directed_by = "Art Dielhenn"