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_17355743_1 (directed_by VARCHAR, written_by VARCHAR)

### Question ###
Name who directed the episode by joe sachs and david zabel

### Accurate SQL ###

SELECT directed_by FROM table_17355743_1 WHERE written_by = "Joe Sachs and David Zabel"