Second of the three-part series today.

I liked it a lot more than the first (which I did enjoy). Less high-octane charging around, and more of a puzzle element, with a good old locked-room mystery. And funnier.

I couldn't spot which Conan Doyle stories were referenced, if any. Apart from Sherlock praising Watson in words Watson used about him.

It does seem a bit mean rationing us to so few. The BBC does make a point of keeping many series down to relatively short runs, compared with the USA where they seem to go on for ever, but three episodes to a season is a bit extreme.

Interesting to compare how the BBC's version of a autistic spectrum detective phenomenon compares with the Scandinavian version on starting on last Saturday in The Bridge second series, with Saga, the blonde Data clone.