Board Thread:The Panopticon/@comment-1293767-20151029072618/@comment-27501528-20160104225233

Since the two parts of The Ultimate Foe were released under the same title (not to mention under the broader same title of Trial of a Time Lord), I'd say that the 'different writers' problem wouldn't apply there. If two episodes are titled 'Trial of a Time Lord part 13' and 'Trial of a Time Lord part 14', there isn't really any need to debate their status as being part of the same story. Whereas for some of the stories mentioned in this thread (i.e. TGWD/TWWL, Face the Raven, Let's Kill Hitler etc), there's an obvious need for debate.