Any mini-series like this

Well, I don't know about mysterious, but tasty I'll give you: Poldark, of course! LOL It's an Aidan Turner tour de force, and he's in practically every scene.

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"How was the war, sir?" "As any war, ma'am, a waste of good men." (Poldark)

Stephen King's "It"
Frankenstein: The True Story (made for TV)

"Hey...I like that...I like that!!" Terry Silver Karate Kid III

I don't really recommend it, but Top of the Lake has twist and turns and subplots and is really creepy at times

Ok, so it's not really anything like this, but i wanna recommend Murder by Death. It's a movie from the 70s that kinda parodies this house party killer concept. It's a hoot and stars really great actors. There was a similar movie in the 80s called Clue, based on the old board game. Again, great actors though i prefer the first one.

It's a movie rather than a mini-series, but check KIND HEARTS AND CORONETS. It dates from 10 years after Christie's story and depicts a mass-murderer's scheme from the murderer's sardonic point of view. It even quotes the nursery rhyme "Ten little n***" toward the end. possibly a reference to Christie's book.

The Escape Artist.....tasty because of David Tennant 

http://www.imdb.com/title/tt2649522/

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Harper's Island

thank me later...

It's not a mini series, but, Grantchester. And the many adaptation'as of Marple / Partners in Crime / Poirot out there

Sadly (as I was looking forward to it) avoid the 2015 version of Partners in Crime