I agree with Diva D- it is such a shame that so many commenters have no scruples about casually giving away the ending in their comments, especially without warning. I must be an imbecile because I have been reading the comments as each episode starts, only to be disappointed time and again by the spoilers. Now I know better. 
As far as this episode is concerned, I really enjoyed it. There was enough twists and turns that it kept you on your toes. If I have any criticism, it's that the author went to such lengths to mislead you that they ended up contradicting themselves. For instance, it seems apparent that all of the servants at the estate worship and adore the first wife, but then we have the husbands characterization of her, which seems to be at odds with the context. There are also conflicting evidence presented for a couple of the characters (a main one at that) that is never explained, followed up on or otherwise straightened out. Lots of loose ends. But hey, how much can they actually do in 40 minutes, right? All in all a fun ride and enjoyable episode.