elementary first look moriarty returns 'Elementary' first look video: Sherlock's ex love and nemesis Moriarty returns

When “Elementary” returns in the new year, Sherlock Holmes is getting a blast from his past, and it’s throwing his present into whack. 

Holme’s ex-love and biggest adversary, Jamie Moriarty — formerly known as Irene Adler (Natalie Dormer) — returns to New York City in “The Diabolical Kind.” The NYPD brings Moriarty in to consult on a kidnapping case, and based on the just-released promo for the dramatic episode, Watson thinks Holmes still has feelings for her.

Moriarty’s return is definitely complicating matters for Holmes, who claims that “Love is a game I fail to understand.”

Watch the clip below:

“Elementary” returns Jan. 2 on CBS.