Sherlock: Series 1

Season overview

Sherlock season 1 introduces a contemporary version of Sir Arthur Conan Doyle’s detective, set in 21st‑century London. The series begins when a chance encounter brings war‑veteran Dr John Watson into Sherlock Holmes’s life. Their personalities appear opposite—Sherlock’s brilliant, eccentric intellect contrasts with Watson’s pragmatic, grounded approach—but the two quickly form a close partnership. Together they tackle a series of baffling cases, using Holmes’s deductive abilities and Watson’s medical and military experience to solve crimes that confound Scotland Yard. The season establishes the modern setting, the dynamic between the lead characters, and the tone of crime, drama, and mystery that defines the show. Created by Mark Gatiss and Steven Moffat, the series stars Benedict Cumberbatch as Sherlock Holmes and Martin Freeman as Dr John Watson. The production presents a fresh take on the classic characters while preserving the core elements of their investigative relationship, positioning the duo as an unbreakable alliance confronting complex investigations throughout the first season.