They haven't introduced him, actually. One episode had a killer who we (both the audience AND Sherlock) were led to believe was Moriarty, but as it turns out, he was just a hired thug (hired by Moriarty, yes, but sight unseen -- the thug [who I believe I saw in the promo for tonight's episode] doesn't know who Moriarty is). And they did use the name "Moriarty."

And the big leap away from canon is that Moriarty killed (or had killed; basically, he's responsible for the death of) Irene Adler. For which Sherlock was calmly ready to kill him in the episode with the hired thug.

So that's all we know, IIRC.

Does he seem the calculating type or the batshit crazy type the BBC was doing?

Since we have not met him...

Some of the things he hired the thug to do seemed to be for pleasure rather than profit, so I'd guess (and it is only a guess) batshit crazy.

I liked this episode of Elementary well enough, but was totally shocked by the _terrible_ dubbing of the villain in the hotel room. I _know_ that actor's voice, and that ain't it.

I wonder why they needed him to sound more British.

The morgue scene made me laugh and laugh. Sherlock is SUCH A CHILD. And exasperated Joan, finally taking over because she can't stand to see a dissection done poorly. Their faces! So great.

I am super curious to see who they have lined up to play Moriaty.

I vote for Steven Fry. Or Hugh Laurie.

You haven't even watched the damn show. You don't get a vote. I vote Hugh Laurie.

Hugh Laurie would be way more fun, but doesn't quite get my vote. I don't know who I'd nominate.

I just hope the meeting with Moriarity is not at the Reichenbach Cafe.

Where Sherlock takes a long time in the bathroom and Joan comments, "I was beginning to think you'd died."