Watch Elementary online as the world's greatest detective, Sherlock Holmes, solves crimes in New York City. The cast includes Johnny Lee Miller (Sherlock Holmes), Lucy Liu (Joan Watson), Aidan Quinn (Captain Thomas Gregson), Jon Michael Hill (Detective Marcus Bell), Natalie Dormer (Irene Adler/Moriarty) and Rhys Ifans (Mycroft Holmes). Elementary is an modern twist on the beloved and classic Sherlock Holmes by Sir Arthur Conan Doyle. In this version, Sherlock relocates to New York City after completing rehab. Watson is a former surgeon and his sober companion. And, oh yeah, she's also a woman. Watch Elementary online, as Sherlock and Joan partner with Captain Gregson and Detective Bell of the NYPD to solve unusual crimes. Sherlock is abrasive and Joan is soothing. Between the two of them, criminals don't stand a chance. Some of the iconic characters, such as Irene Adler, Moriarty, Lestrade and Mycroft, show up to aid or hinder Sherlock's investigations. Elementary is a welcome update on a classic character. Johnny Lee Miller is perfect as Sherlock Holmes, switching effortlessly between cockiness and vulnerability. Watch Elementary online and see if you can spot the killer before Sherlock and Watson do.