User:SOTO/Forum Archive/The Wikia Archives/@comment-216.165.251.187-20150920164837/@comment-1827503-20151007143844

User:SOTO/Forum Archive/The Wikia Archives/@comment-216.165.251.187-20150920164837/@comment-1827503-20151007143844 RogerAckroydLives wrote: Those production codes are attributed, not actually used on any production documents for the series. Production codes were abandoned after the 2011 Christmas special. That just throws up even more questions.