The Wormhole wrote:
I remember Russell [T Davies] told me that he had a big old plan as to why there were two Peter Capaldi’s in the Who universe: one in Pompeii and one in Torchwood.
Wouldn't that just be the time/space duplicity thing that explains why Gwen Cooper so similar to Gwyneth from The Unquiet Dead?
Was the connection between Gwen and Gwyneth ever explained on screen? Or was that something that the viewers knew because RTD had talked about it from time to time?
RTD may have had an explanation in mind for why Frobisher and Caecilius looked alike, but there was never a way of using that explanation within Children of Earth
because 1) it wasn't relevant to the story and 2) it wouldn't have moved the story forward.
This sounds like Moffat wants to do something with the idea that these characters are connected. I can't think of anything more inward looking than explaining why the Doctor looks like a one-shot guest star from five years ago and a star of a spin-off series from four years ago.