Full Name: Martha Louise “Mrs.” Hudson
Franchise: Sherlock (BBC, 2010–2017)
Role: Landlady of 221B Baker Street, friend and ally of Sherlock Holmes & John Watson
Portrayed By: Una Stubbs
First Appearance: Series 1, Episode 1: “A Study in Pink”
Mrs. Hudson is Sherlock Holmes and John Watson’s landlady, though she famously reminds them, “I’m not your housekeeper!” She inherited the building at 221B Baker Street after her late husband — a drug dealer executed in Florida — left it to her. This dark past never defines her, though; instead, she becomes a beloved maternal figure to Sherlock and John, balancing their eccentric and often dangerous lives with tea, warmth, and occasional sharp wit.
“I’m your landlady, not a plot device!”
In Arthur Conan Doyle’s original stories, Mrs. Hudson was a largely background figure, known mostly as the landlady who provided meals and tended to Sherlock’s flat. The BBC series transformed her into a central part of Sherlock’s support system, fleshing her out into a three-dimensional character with a past, personality, and agency. This reinvention turned her into one of the most beloved “found family” figures of the adaptation.
I adore Mrs. Hudson because she is the heart of Baker Street. In the storm of Sherlock’s brilliance and John’s bravery, she is the constant — warm, grounding, and fiercely loyal. Her blend of kindness, humor, and unexpected steel makes her unforgettable. She is not just a landlady, but a surrogate mother, a friend, and proof that “ordinary” people are extraordinary in their own right.