User:SOTO/Forum Archive/The Wikia Archives/@comment-216.165.251.187-20150920164837/@comment-26469787-20151007104019

User:SOTO/Forum Archive/The Wikia Archives/@comment-216.165.251.187-20150920164837/@comment-26469787-20151007104019 Those production codes are attributed, not actually used on any production documents for the series. Production codes were abandoned after the 2011 Christmas special.