Jonny Lee Miller plays Sherlock Holmes, Lucy Liu plays Joan Watson, and Aidan Quinn plays Captain Gregson in "Elementary", a modern-day US adaptation set in New York.
Main cast
- Sherlock HolmesJonny Lee Miller1–7Main
- Dr. Joan WatsonLucy Liu1–7Main
- Captain Thomas GregsonAidan Quinn1–7Main
- Detective Marcus BellJon Michael Hill1–7Main
Supporting cast
- Irene Adler / Jamie MoriartyNatalie Dormer1–2Supp
- Mycroft HolmesRhys Ifans2–3Supp
- Gareth LestradeSean Pertwee1–2Supp
- Alfredo LlamosaAto Essandoh2–7Supp
- Captain DwyerJohn Noble2–3Supp
- Shinwell JohnsonNelsan Ellis5Supp
- MichaelDesmond Harrington6Supp
Guest & voice
- Sebastian MoranReg Rogers4Guest
- Hannah GregsonMolly Price1Guest
- Dr. MasonMichael McKean6Guest
- Moriarty (false identity)Lucas Till2Guest
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About this cast
"Elementary" is a crime drama that reimagines Sherlock Holmes in contemporary New York City, with Jonny Lee Miller as the brilliant but recovering addict detective, Lucy Liu as his sober companion Dr. Joan Watson, and Aidan Quinn as NYPD Captain Thomas Gregson. The series ran for seven seasons on CBS and aired in the UK on Sky Living.
FAQs
Who plays Sherlock Holmes in Elementary?
Jonny Lee Miller portrays Sherlock Holmes in the series.
Who plays Joan Watson in Elementary?
Dr. Joan Watson is played by Lucy Liu.
Is Elementary connected to the BBC Sherlock series?
No, Elementary is a separate US adaptation set in modern New York and is not connected to the BBC series.
How many seasons of Elementary are there?
Elementary ran for 7 seasons, from 2012 to 2019.
Who plays Moriarty in Elementary?
Natalie Dormer plays Irene Adler, who is later revealed to be Moriarty.
Sources & where to watch: IMDb · Wikipedia · Where to watch (JustWatch UK) · Updated June 2026