There is some dispute, for instance, about whether to count Season 23's The Trial of a Time Lord as one or as four serials, and whether the unfinished serial Shada should be included.
Det råder till exempel delade meningar om huruvida The Trial of a Time Lord i säsong 23 bör räknas som ett eller fyra äventyr, och huruvida den icke fullbordade Shada skall räknas in.