Another excellent, excellent ep. I have been really enjoying the arc. It is so nice to see the intense care and detail that has gone into the presentation of the series in terms of visuals, audio, etc. Of course KyoAni prolly had to pay through the nose to achieve it, but I appreciate it nonetheless.
Oreki's sister kinda reminds me of a Sh Holmes/Victorique type ... presented with only a few bare facts and their mind seems to make superhuman leaps of logic and conclusions. Compared to such a mode of operation in particular Hotarou seems a little more "human" in terms of "deduction".
Ah well. 8/10 vote from me.