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_14346689_1 ( series__number INTEGER, directed_by VARCHAR )

### Question ###
What was the series number of the episode directed by Rob Bailey?

### Accurate SQL ###

SELECT MAX(series__number) FROM table_14346689_1 WHERE directed_by = "Rob Bailey"