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_18424435_4 (no VARCHAR, directed_by VARCHAR, written_by VARCHAR)

### Question ###
What number episode in the series was directed by Kelly Makin and written by Mark Ellis & Stephanie Morgenstern?

### Accurate SQL ###

SELECT no FROM table_18424435_4 WHERE directed_by = "Kelly Makin" AND written_by = "Mark Ellis & Stephanie Morgenstern"