Doctor Who is definitely the last thing I would dub as "internally-consistent". It's a serial--and the duct taped seams show--sometimes glaringly so.

But, every now and then, the writing CLICKS and you get genuine emotional ART--generally as a monologue.

I will admit a fair bit of enjoyment comes from the TARDIS Technical Index: https://whoniverse.net/tardis

I think the existence of enough technical information for such an index to even be possible is what I mean by internal consistency. Not the absence of plot-holes or ret-cons.

A lot of shows simply aren't very technical.