Not the one from the books - apparently there was a TV adaptation in present day London, and he's from that. But genuinely a Sherlock Holmes, at any rate.

Well... he actually might, though not in the way you're thinking. He's from a different universe than us - so whatever he may know or not know about the people of England, he won't know you that way. However, in his world, I'm in a popular English television series. He might know you from that - I never really asked how much he knew. [Because he doesn't like thinking about his future.]