Some spoilers ahead if you have not been keeping up with the series:
Elementary, the Sherlock Holmes reboot on CBS, started off somewhat slowly with nearly the entire first season working almost like a pilot, slowly setting everything into place, with a few exceptions.
If you have not watched the series, it is set in modern day New York City and Sherlock (Jonny Lee Miller) is a drug addict whose very wealthy father hired Joan Watson (Lucy Liu), a former surgeon, to be his sober companion. Over the course of the season, the two became friends and colleagues. Things were progressing nicely until Sherlock's past came back to haunt him in the form of Moriarty/Irene Adler (Natalie Dormer). The first season ended with Moriarty being trumped by Sherlock and Joan.
As you might have guessed, that could not be the end of Moriarty, and CBS has released a preview of her return. Seriously though, if you haven't given this series a chance, there is still time for a bit of binge watching before it returns next week.
Photo credit: Elementary