Sherlock is a British detective series on BBC One. The series premiered on June 25th 2010.
Sherlock depicts consulting detective Holmes, assisting the Metropolitan Police Service, primarily DI Greg Lestrade, in solving various crimes. Holmes is assisted by his flatmate, Dr John Watson, who has returned from military service in Afghanistan. Although the series depicts a variety of crimes and perpetrators, Holmes' conflict with his archnemesis Jim Moriarty is a recurring feature.