CREATE TABLE table_26052 ("Episode #" FLOAT, "Season #" FLOAT, "Title" CLOB, "Directed by" CLOB, "Written by" CLOB, "Original airdate" CLOB, "Production code  ( order they were made )  #" FLOAT)

What is every production code for episode # 13?
SELECT "Production code (order they were made) #" FROM table_26052 WHERE "Episode #" = '13'
SELECT "Production code (order they were made) #" FROM "table_26052" WHERE "Episode #" = '13'