A consulting detective that is mysterious, condescending and very intellectual with very little friends.

A retired military doctor. Sherlock's best friend,colleague and flat mate. He writes a blog about his adventures with Sherlock.

A "consulting criminal" which is responsible for the criminals and crimes by acting as a sponsor, an informant, or a mastermind.

Sherlock's older brother and engages in sibling rivalry with Sherlock. He occupies a "minor position in the British government".

A 31-year-old specialist registrar working in the morgue at St Bartholomew's Hospital with an apparent crush on Sherlock.

The landlady of 221B Baker Street. She is kind and gradually starts to care for Sherlock and Johns welfare.

A detective inspector in works for Scotland Yard. Sherlock's colleagues and friends even though they don't get on sometimes.

John Watson's wife. A former assassin and a part-time nurse in John's practice whom he met following the apparent death of Sherlock.

Professionally known as "The Woman". One of the only love interests of Sherlock Holmes.
"Let's have dinner."