John Watson (portrayed by Martin Freeman) is the deuteragonist of the 2010 BBC series, Sherlock. He is best friend of the title character Sherlock Holmes, husband of the late Mary Watson and father of Rosamund "Rosie" Watson.

John is based on Dr. Watson from the Sherlock Holmes novels and short stories by Sir Arthur Conan Doyle

Role in Series Edit

Series 1 Edit

Series 2 Edit

Series 3 Edit

Sometime prior to the series, John met  Mary Morstan, a young woman who he worked with at a hospital.

Pre-Series 4 Edit

Relationships Edit

Family Edit

Allies Edit

Enemies Edit

  • James "Jim" Moriarity
  • Irene Adler (formerly)
  • Eurus Holmes (formerly)

Trivia Edit

  • John's age is never disclosed. It is safe to presume he is in his mid to late thirties when the series begins, the same age Martin Freeman was.


John Watson/Gallery

Main Characters
Sherlock HolmesJohn WatsonGreg LestradeMrs. HudsonMycroft HolmesMolly HooperJim MoriartyMary Morstan