CREATE TABLE table_2342078_2 (production_code__order_they_were_made___number VARCHAR, episode__number VARCHAR)

What is every production code for episode # 13?
SELECT production_code__order_they_were_made___number FROM table_2342078_2 WHERE episode__number = 13
SELECT "production_code__order_they_were_made___number" FROM "table_2342078_2" WHERE "episode__number" = 13