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_name_35 ( episode INTEGER, performer_4 VARCHAR )

### Question ###
What is the average episode number where jimmy mulville was the 4th performer?

### Accurate SQL ###

SELECT AVG(episode) FROM table_name_35 WHERE performer_4 = "jimmy mulville"