10 Best Sherlock Characters

10. Eurus Holmes

There was never any mention of a third Holmes sibling in Conan Doyle’s original stories, and as such, the introduction of Eurus took everyone by surprise.

One of the most interesting aspects of Eurus was her various disguises. In ‘The Six Thatchers’ she became Watson’s temporary love interest, and in ‘The Lying Detective’ she masqueraded as both Watson’s therapist and Faith Smith – the daughter of Culverton Smith.

‘The Final Problem’ then put Eurus front and centre of the show as she subjected Sherlock, Watson, and Mycroft to a series of psychological challenges. Though this episode was far-fetched, Eurus’s dialogue – particularly with Sherlock and Mycroft – was consistently captivating.

Despite the over-the-top nature of her character, therefore, Eurus never failed to be entertaining.