Further to a previous Rock Notes post, it occurred to me that the correct frame of reference for the slightly aggrieved London hardcase calling for Thompson was, of course, Spiny Norman:
It then occurred further that the Netflix pilot would only succeed with the casting of Emma Thompson:
So yeah, Emma Thompson plays Emma Thomsen, a successful Scandinavian crime novelist, who spends the series battling the attentions of a giant animated hedgehog, Spiny Normal (n.b. hilarious British comedy reference/anxiety of inference gag). Spiny Normal is trying to get her to front a crime procedural he has written about hedgehogs. He thinks she needs a comeback vehicle, which of course she does not, being the successful Scandinavian crime novelist rather than the British actress.
Thomsen has to resolve this mysterious collision of worlds, aided/hindered by her patronus, Thomson the cat. Thomson knows how to contact everyone in the multiverse but is perpetually popping off for a pee.
Thomson would probably have to be voiced by John Thomson (Jazz Club).
…I have actually got up to about Episode 4, if anyone’s interested in bunging me a few quid.