So the two main points of debate right now are as follows.
- Do we cover story numbers/the idea of two parters on story pages at all?
- If we do, and we go with my three-rule proposal, how do we want to treat Heaven Sent/Hell Bent? Are they just too different to possibly be considered a two-parter, or do we go with the BBC statement of "two-part story", quoted in full above, and make at least one exception/expansion of rules to account for this?
- More specifically within 2, do we allow for two-part stories whose two episodes each belong to their own production blocks (alone), with a maximum of one (1) episode (not story, episode) in between, to also be considered two-parters, as an expansion to the rule? I'm in favour.
- Do we allow for an expansion of "guest character" to be "guest character and/or unique setting"? I think this would be wise. I can't think of any examples but HS/HB of a two-parter without a unique character between them (though, notably, TGWD/TWWL has only a guest character and not a setting in common). Most two-parters have both in common, but series 9 has produced two oddities, where only one is present. So, again, I think it would be a good decision to allow for either or both, unless we do not want to consider HS/HB to be a two-parter, because it's too much of a stretch. An argument could definitely be made for that.
If anyone has any questions about what has been covered so far, please do feel free to ask and question everything. I would love to see if my three rules can be challenged in any way. I am confident they can stand the test.