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_27208311_1 ( episode VARCHAR, writer VARCHAR )

### Question ###
What is every episode with Barry Purchese as the writer?

### Accurate SQL ###

SELECT episode FROM table_27208311_1 WHERE writer = "Barry Purchese"