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I gave him a few commands, he didn't respond. At first, I thought he was stubborn. Some slaves are like that. Then I whacked him with this.

— Mistress Felicia, "Poison Pen"

Mistress Felicia is a professional dominatrix and an acquaintance of Sherlock Holmes. She and Sherlock met through mutual friends and bonded over a fascination with medieval torture devices.


Season 2[]

Mistress Felicia was called to meet a client but discovered that the client was dead and so called Sherlock, who later arrived with the police. She gave Holmes a whip as a thank you gift.[1]

S02E04-Felicia Gregson Watson
I took off the mask and saw that he was dead.


  1. Season 2, episode 4: "Poison Pen"