Board Thread:The Panopticon/@comment-1293767-20151029072618/@comment-1827503-20151029074404

I'll bring out what CzechOut said on Forum:Story Numbering to try and prove my point. (formatted as in original thread, including American English spellings)

CzechOut wrote:

Shada definitely is 109. Numbering is a production thing, and from a production standpoint, Shada exists. It has a production code which remains honored to this day, so therefore it is a "real" story in the order. That's why our "made next/made prev" navigation honors Shada.

This rule can't be adapted strictly to cover the BBC Wales era because BBC Wales two-parters had two production codes, including The End of Time being 4.17 and 4.18, before codes were scrapped for the 2012 series. However, we can honour the intent of this rule by not declaring two linked episodes to be a two-parter without unambiguous production intent.