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_20726262_2 (production_code VARCHAR, no_in_series VARCHAR)

### Question ###
What was the production code for episode #1?

### Accurate SQL ###

SELECT production_code FROM table_20726262_2 WHERE no_in_series = 1